This iced tea company's name change sums up everything ...

Blockchain, the technology behind virtual currency Bitcoin.

When Wall Street types are optimistic about something, like a business or a trend, they're often said to be "long" on it - meaning they're inclined to invest in hopes of a profit.

These days, a lot of folks in the financial sector are excited about bitcoin and its underlying technology, the so-called "blockchain," because of its...

Read more


Bitcoin: The Digital Currency of the Future | Invest It Wisely

By Kevin

Ever since the dawn of the Internet and of the information age, writers and visionaries have visualized the disruptive changes that such technologies would eventually have on our lives; they have imagined futures where we spend more of our lives online than offline, and where ubiquitous access to technology and connectivity would be a strong decentralizing force, placing power in the...

Read more


Cryptocurrency Development Company | Bitcoin Exchange ...

Cryptocurrency Development Company

Today, digital forms of money also known as cryptocurrencies have transformed into an overall wonder known to most by far. While still by one means or other geeky and not grasped by a considerable number individuals, banks, governments, and numerous associations think about its essentialness. In the upcoming years, you'll encounter impressive challenges a vital...

Read more

Date: 2017-12-15 05:53:03

Manning | Grokking Bitcoin

If you think Bitcoin is just an alternative currency for geeks, it's time to think again. Grokking Bitcoin opens up this powerful distributed ledger system, exploring the technology that enables applications both for Bitcoin-based financial transactions and using the blockchain for registering physical property ownership. With this fully illustrated, easy-to-read guide, you'll finally understand how Bitcoin works, how you can use it, and why you can trust the blockchain. You'll discover how...

Read more


Related topics : bitcoin digital currency exchange / digital currency like bitcoin / bitcoin digital currency / using bitcoin for currency exchange / bitcoin digital wallet - Bitcoin Prices & CryptoCurrency Market Data

Choose a CryptoCurrency Wallet

What is Bitcoin (BTC)?

"Bitcoin�is a worldwide�cryptocurrency�and digital�payment system�called the first decentralized�digital currency, since the system works without a central repository or single administrator.�It was invented by an unknown programmer, or a group of programmers, under the name�Satoshi Nakamoto�and released as�open-source...

Read more


Related topics : bitcoin digital currency price / 1 bitcoin cash to btc / bitcoin digital currency exchange / 1 bitcoin worth 2017 / using bitcoin for currency exchange

Bitcoin Investment Trust Ups Its Proposed IPO But Approval ...

Click here to view original web page at

On January 20, 2017, Grayscale Investments LLC filed for an initial public offering (IPO) for its Bitcoin Investment Trust to be listed on the NYSE Accra exchange in an attempt to bring bitcoin investing to the masses through a publicly tradable investment vehicle in the form of a new stock.

Grayscale Investments , the investment...

Read more


Related topics : bitcoin investment trust ipo / bitcoin investment trust stock price / bitcoin investment trust ticker / bitcoin investment trust stock / bitcoin investment trust fund

Bitcoin Market - Global Industry Trends, Analysis And ...

Bitcoin Market - Global Industry Trends, Analysis And Segment Forecasts To 2020 - Bitcoin Market, Outlook, Size, Application, Product, Share, Growth Prospects, Key Opportunities, Dynamics, Analysis, Bitcoin Report - Grand View Research Inc

Bitcoin Market Analysis, Market Size, Application Analysis, Regional Outlook, Competitive Strategies And Forecasts, 2014 To 2020

Published Date: Jul,...

Read more


Home - How To Buy Bitcoins

Bitcoin is the world's first decentralized digital monetary system

Advance Mathematics - Cryptography

Bitcoins are created and controlled by advanced mathematics and cryptography


anyone in the world, of any age, in any country, for any purpose, may start accepting and spending Bitcoins immediately

Worldwide Used

used in every country in the world


Fees are...

Read more


Bitcoin Broker Review | Best Regulated Forex Brokers with ...


What is bitcoin trading?

That means Bitcoin can be�traded�like a commodity, like gold, oil metals or even corn coffee and the likes, still . everything is about the value of the altcoin or Bitcoin of that specific moment. This is where "Buy Low, Sell High comes in . so you trade on the value of the Bitcoin(BTC) against the USD.

How do Bitcoin exchange work?


Read more

Date: 2017-12-20 05:44:53

Why bitcoin could trigger the next global financial crash ...

Cryptocurrencies like bitcoin are speculative derivatives with nothing to back them up, and that poses a danger to financial system

PUBLISHED : Wednesday, 13 December, 2017, 10:53am

UPDATED : Wednesday, 13 December, 2017, 10:30pm

Forget Fire and Fury. It's solid US economic data that matters

9 Jan 2018

" ... we do not expect significant spillovers from the subprime market to the rest of the...

Read more


Related topics : real time bitcoin market data / bitcoin price charts real time / bitcoin real time price / using bitcoin for currency exchange / bitcoin currency exchange

Bitcoin Generator Online - FREE BITCOIN GENERATOR ONLINE 2017 is the new and may only working free bitcoin generator on the market. If you want to learn more about how we manage to make a profit from this click on the 'Learn more' button below.

Learn more »

Generate 0.25 Bitcoins

To generate 0.25 Bitcoins click on the generate button below. For this you will need to complete one survey.

Generate »

Generate 0.5 Bitcoins

To generate...

Read more

Date: 2017-11-15 16:08:26

How to buy bitcoin in Hong Kong | finder

Where and how to buy bitcoin in Hong Kong

8 January 2018

You keep hearing about it, but what exactly is bitcoin and how do you buy it? Read on for finder's definitive guide.

There are two main ways to buy bitcoin in Hong Kong.

Use a bitcoin broker. This is probably the easiest way to buy bitcoin. If you just want to get it done quickly and easily, and have no plans to become a cryptocurrency...

Read more


Bitcoin Fork Countdown Monitor |

What is Bitcoin?

Bitcoin is the first digital peer-2-peer decentralized "cryptocurrency".

It was created in 2009 by "Satoshi Nakamoto" (an anonymous person/group) in 2008 and officially released a year later. At first Bitcoins could only be mined and not bought. Mining is the process where computers run software and exchange computing power for Bitcoins.

What is a fork?

A fork is when a cryptocurrency splits into two, yeilding free additional currency of another type.

It occurs when a cryptocurrency's existing code is changed, resulting in both an old and new version. While the old version of the code continues to exist and function as it did...

Read more

Date: 2018-01-19 23:01:38

Bitcoin IRA Reviews - How To Put Bitcoins In Your ...

Technology has changed how we manage our individual retirement accounts (IRAs). We no longer need to visit the offices of an investment firm to manage our accounts. We can do it comfortably from our homes.

What has largely remained unchanged since IRAs were introduced in 1974, are the types of investments we use to fund them. Until now, traditional forms of funding have included stocks, bonds,...

Read more


Indians lose crores of rupees in bitcoin exchange collapse

It is believed that many Indian bitcoin operators and traders have lost crores of rupees in the collapse.

Indians across the country hold over 35,000 bitcoins (worth over Rs 100 crore). Non-Resident Indians too deal in this currency, which is currently trading at $550 apiece but is not backed by any financial authority or real asset.

Today, a single bitcoin costs about Rs 37,000. This includes...

Read more

Date: 2018-01-25 06:41:18

Trusted E-currency Exchangers and Forex Brokers Advisor | GEC

Getecurrency is online service that monitors and lists all Payment Systems , E-currency Exchangers and Forex brokers as well .

Getecurrency services was started on July 2007 under the name , but due to some technical issues we were unable to

renew our domain in 2016 , as a result we registered new domain under the name Getecurrency.Net to complete delivering our superior services...

Read more


Related topics : electronic currency exchangers rating / electronic currency exchanger / electronic currency payment system / online currency exchange bitcoin / using bitcoin for currency exchange

Bitcoin Payments with Sources - Stripe

Bitcoin Payments with Sources

Use Sources to accept payments using Bitcoin, the popular digital cryptocurrency.

Stripe users in the United States can accept Bitcoin for USD payments from customers using Sources --a single integration path for creating payments using any supported method.

During the payment process, a Source object is created and your customer is given a receiver address to send...

Read more


Luno Bitcoin Wallet 4.0.2 Download APK for Android - Aptoide

Applications Finance Luno Bitcoin Wallet

Description of Luno Bitcoin Wallet

Luno makes it safe and easy to buy, store and learn about digital currencies like Bitcoin and Ethereum.

NEW: Buy Ethereum!

We are excited to announce that Ethereum is now available on Luno!

Ethereum is another digital currency, similar to Bitcoin, that has exploded in price and popularity in recent months. You can now...

Read more


Bitlish - Secure and convenient bitcoin exchange

Quickly and securely exchange your bitcoins to Euros, US dollars and other currencies with low fee schedule. Deposit and withdraw to the credit card instantly, or use your bank account to minimize fees.

Unfortunately your browser doesn't support WebSockets and can't work with Bitlish. Please upgrade your browser to the latest version.

Why choose Bitlish?

Fast start

Try it with instant registration. You can deposit and withdraw up to 200EUR without verification. Nice, simple but powerful user interface for bitcoin enthusiasts.

Low or zero fees

0% Maker fee: we charge no trade fee for your own...

Read more


Related topics : bitcoin euro exchange / exchange bitcoins for dollars / bitcoin dollar exchange / bitcoin exchange fees / using bitcoin for currency exchange

Trade Bitcoin With Gain Capital - ForexTV

Gain Capital (NYSE: GCAP) will begin offering bitcoin trading in Q4. Bitcoin will be offered as a currency pair, similar to fiat currency pairs. GCAP could capture significant bitcoin trading volume by offering lower fees and providing the security of a ...

The ForexTV Bitcoin editor automatically searches and aggregates stories related to bitcoin and other crypto currencies.

Latest posts by...

Read more


Related topics : bitcoin trading currency market / bitcoin currency trading / bitcoin trade market / using bitcoin for currency exchange / bitcoin currency of the future

What is bitcoin and why is the digital currency surging ...

The bitcoin frenzy shows no sign of letting up, with the price of the digital currency soaring�and bitcoin futures set to start trading on Sunday. Here's a look at what bitcoin is and why there's so much excitement around it.

So what is bitcoin?

It's a fairly new type of currency, not controlled by any government or centrally processed by any bank or company. You can use it to buy things,...

Read more

Website: | Give the gift of Bitcoin, Cold Storage ...

Commemorative greeting cards


Use your own public key + custom B&W image or 40 character message in place of private key

Buy Now

Customized +

Send us your own public key and replace the private key with custom image or message. You can keep your private key secure, and gift it to a friend with full confidence.

Use your own Public Key

40 character message (optional)

EXTRA 10% OFF when you...

Read more


Digital currency exchange operators Coinbase and Bitfinex ...

(Reuters) - Digital currency exchange operators Coinbase and Bitfinex reported problems with service through their websites on Tuesday, frustrating traders seeking to cash in on the latest surge in the value of bitcoin and other cryptocurrencies.

Continue Reading Below

Wallet-provider Coinbase's website showed "service unavailable" early on Tuesday U.S. time, flashing a message that said it was down for maintenance. Its exchange was still quoting prices, although it also said it was...

Read more


Related topics : bitcoin digital currency exchange / digital currency exchange business / digital currency exchanger / digital currency exchange provider / bitcoin currency exchange history

Buy Litecoin with PayPal, Credit Card, Bitcoin and more

On this site you can buy Litecoin instantly with a credit card or use the trading platform.

Credit Card (Visa or Mastercard), Payza, OKPAY, Payeer, Perfect Money, AstroPay and Yandex Money.

Trade Litecoin and other currencies. You can use various payment methods for buying Litecoin.

Neteller, Perfect Money, Payeer, Payza, Money Polo, Qiwi, SEPA and Wire Transfer.

Exchange site for buying Litecoin and exchanging various currencies.

Perfect Money, OKPAY, MoneyPolo, AstroPay, OBT / Skrill, Bank Wire and SEPA.

Litecoin and Bitcoin trading platform from Europe.

Wire Transfer, SEPA, AdvCash and...

Read more


2009 Indian Rupee to Bitcoin, convert 2009 INR in BTC

2009 INR Indian Rupee to BTC Bitcoin

The page provides the exchange rate of 2 009.00 Indian Rupee (INR) to Bitcoin (BTC), sale and conversion rate. Moreover, we added the list of the most popular conversions...

Read more


Related topics : today's bitcoin rate in indian rupees / today bitcoin rate in indian rupees / today btc rate in inr / bitcoin rate history in rupees / today bitcoin rate in inr

Paxful Review - is scam or good cryptocurrency ...

1%, seller

Paxful is a US-based P2P cryptocurrency exchange where clients can buy and sell bitcoins for fiat currency between each other. The service is similar to that of Local Bitcoins.

The platform accepts clients globally, but it is worth noting that it dose not accept clients from the state of New York, as it does not have the relevant BitLicense, introduced by the...

Read more


Where You Can Buy Bitcoin and Other Cryptocurrency Today

In the crypto-universe, this function is done by cryptocurrency e-wallets that are similar to�the e-wallets offered by Samsung, Apple ( AAPL ), or PayPal ( PYPL ). Once you secure a wallet, you can purchase bitcoins from bitcoin exchanges and various other sources.

Interested in ARKK? Don't miss the next report.

Sign Up

Receive e-mail alerts for new research on ARKK

Success! You are now...

Read more

Date: 2017-12-20 01:48:44

Related topics : using bitcoin for currency exchange / trusted bitcoin trading exchange marketplaces / transfer from bitcoin wallet to bank account / bitcoin exchange bank transfer / virtual currency exchange bitcoin

Bitcoin futures trading could burst its own bubble -

Bitcoin futures trading could burst its own bubble

Opening the cryptocurrency to futures trading could be a sign of its demise, experts warn

Nafis Alam ,�The Conversation2017-12-19T08:59:55Zo2017-12-19T08:59:55Zo0 Comments


This piece originally appeared on The Conversation .

A new wave was added to the never-ending Bitcoin mania when the Chicago Board of Exchange (CBOE) became the...

Read more


Related topics : bitcoin is the new gold of the future currency / bitcoin currency of the future / bitcoin money of the future / bitcoin trading price / bitcoin trading currency market

Bitcoin Mining: Can You Really Make Money Doing it?

Virtual currencies are slowly but surely becoming more popular, as more people start using them. One of the most popular virtual currencies is the Bitcoin (BTC), and ever since its appearance in January 2009, it has spread like wildfire and many online businesses have accepted it as a payment method .

Even though some are still weary about the Bitcoin, as it is linked to the deep web and other...

Read more

Date: 2017-12-19 05:49:37

Bitshares Stock Price Google Finance -

The Cryptocurrency globe is altering swiftly and here is the info regarding "Bitshares Stock Price Google Finance".

Dogecoin is yet one more among the prominent Litecoin obtained crypto-currencies in circulation today and also it is a fun, new and swiftly growing form of digital money. Cryptocurrency is totally confidential, decentralized, and also extremely secure. Dogecoin was created by...

Read more


How to Buy Ripple in India: 4 Platforms Where You Can Buy ...

Ripple's market cap shot up more than 2x in the last week alone taking Ripple's market cap to nearly 30 billion USD. While there are many platforms where Indians can buy Bitcoin and Ethereum , Ripple coin exchanges are very few in India. Below, we look at some cryptocurrency platforms where people can buy Ripple (XRP) in India�in INR.

List of platforms to buy Ripple (XRP) in INR:


Read more


Related topics : exchange bitcoin for ethereum / buy bitcoin exchange india / exchange bitcoin to ripple / bitcoin buy sell exchange / buy bitcoin exchange

Buy These 3 Stocks to Profit From Bitcoin – Investors Alley

There is one common theme that I've noticed time and time again over my 30+ years in the market. That is the absolute contempt and arrogance powerful incumbent companies have toward new and disruptive technologies.

Few remember that, at the end of 1999, the CEO of Eastman Kodak - George Fisher - said this: "There are 117 dot-com companies out there who keep saying they'll eat Kodak and Fuji[Film]...

Read more


Bitcoin investment in Nigeria: facts you should know NAIJ.COM

Bitcoin is an innovative payment network. It is also a new type of currency. You might want to know more information about this new payment. Keep reading and learn about Bitcoin investment in Nigeria.

Bitcoin investment in Nigeria

It is easier to explain what is Bitcoin by saying "Bitcoin is money". Today, it is popular all over the world. A lot of people send money to their relatives, families...

Read more


Bitcoinpaygate | Bitcoin Payment Gateway & Processor

Please login with your Account


Terms & Conditions

These Merchant Terms of Use (the Terms) govern your use of the products, services or any other features, technologies or functionalities (the Services) provided by or associated sites, (, we, our, or us) through website, API or through any other means. You and your mean the...

Read more


How To Buy Bitcoins Without Verification

djbooth007 Posted in Bitcoin Adoption , Blog

Various US regulatory bodies are scrutinizing Bitcoin with ever increasing fervor. Due to fears of regulation and strict anti-money laundering (AML) laws and a push to "Know Your Customer" (KYC), many of bitcoin exchanges have faced severe issues when dealing with customers in the US.

For people who want to buy bitcoins without verification for cash,...

Read more

Date: 2017-12-20 05:37:21

Convert Currency, Bitcoin to Canadian dollar


Bitcoin (BTC) to Canadian dollar (CAD) currency exchange rates

How many Bitcoin is a Canadian dollar? One BTC is 19 222,7500 CAD and one CAD is 0,0001 BTC. This information was last updated on December 30, 2017 at 12:05 AM CET.

Currency converter

Choose currency and type the amount of money that you want to convert, to see the results below.




These values represent the daily average of rates that Convertworld...

Read more


Related topics : bitcoin canadian dollar exchange / 1 canadian dollar to bitcoin / bitcoin value canadian dollar / bitcoin to dollar exchange rate history / bitcoin dollar exchange rate chart

How To Make Money With Bitcoin, The Wild West Of Digital ...

12/12/13 AT 4:37 PM

Bitcoins Photo: Reuters

The price of bitcoin fell around the world on Dec. 5, just after the People's Bank of China announced that domestic commercial banks in the country could no longer deal in the digital currency bitcoin (BTC).

For a day and a half, trading prices plummeted, dropping 50 percent from record-setting highs to just under $600 on Mt.Gox , "the world's largest...

Read more

Date: 2017-12-20 02:10:42

Will Bitcoin really become a universal currency? | News ...

Will Bitcoin really become a universal currency?

14 Aug 2014, by Test 2 Test 2

Image source:

There has hardly been a more intriguing, controversial or divisive invention in the history of finance than Bitcoin . While it has taken its time to draw universal attention and is still some way from becoming a mainstream item, there are plenty of indications to suggest that it...

Read more


Related topics : will bitcoin be the one world currency / bitcoin bank of america merrill lynch / bitcoin one world currency end times / bitcoin one world currency / bank of america bitcoin a first assessment

How much is 1 bitcoin btc (BTC) to € (EUR) according to ...

Main Page / Converter / BTC /1 Bitcoin to Euro

1 bitcoin to euro according to the foreign exchange rate for today

You have just converted one bitcoin to euro according to the recent foreign...

Read more


Related topics : bitcoin euro exchange rate / convert 1 bitcoin to euro / bitcoin exchange rate eur / convert 1 btc to euro / currency converter bitcoin to euro

File:Bitcoin-FBI.pdf - Wikispooks

Bitcoin Virtual Currency: Intelligence Unique Features Present Distinct Challenges for Deterring Illicit Activity

Executive Summary

Bitcoin - A decentralized, peer-to-peer (P2P) network-based virtual currency - provides a venue for individuals to generate, transfer, launder, and steal illicit funds with some anonymity. Bitcoin offers many of the same challenges associated with other virtual...

Read more

Date: 2017-12-18 17:48:54

Related topics : bitcoin virtual currency unique features present distinct challenges for deterring illicit activity / bitcoin virtual currency fbi report / fbi bitcoin virtual currency / virtual currency like bitcoin / bitcoin p2p virtual currency

USB Bitcoin Miner Article

How to Get Started as a USB Bitcoin Miner

Getting into the world of bitcoin is exciting, but can also be a little confusing. Read on to learn about bitcoin and how to get started as a USB bitcoin miner .

Keyword(s): usb bitcoin miner

Do you think you have what it takes to become a bitcoin miner? Are you looking at buying a USB Bitcoin Miner?

Maybe you're drawn to some of the things you've heard...

Read more

Date: 2017-11-23 22:03:34

Bitcoins in India: Online trading, exchange price and ...

After 300 percent price rise in a year, Bitcoin has become an interesting Investment option for everyone. Bitcoin has instilled curiosity and excitement for investors and despite it fear of risk is prominent, whether to invest in Bitcoin safe or not. Bitcoin recently got highlighted in the news during Ransomware attack as hackers looked keenly interested in bitcoins. Most of the malicious transactions now days by hackers involves bitcoins. Last month Japan's biggest electronics retailers, Bic Camera, began accepting bitcoin at two stores in Tokyo.

At present, there are only 21 million bitcoins available in the market. By the end...

Read more


Bitcoin regulations in India - Livemint

India launches high performance computer system Mihir

Last week, income tax department surveyed the major bitcoin exchanges in India. The survey reports said, this was done to collect information about transactions and check whether there was a risk of tax evasion. This week, it was reported that the income tax department is set to issue notices to about 5,00,000 high net worth individuals...

Read more

Date: 2018-01-30 19:24:59

Related topics : virtual currency exchange bitcoin / bitcoin india exchange / virtual global currency / virtual currency trading india / virtual currency in india

Cybercriminals Unleash Bitcoin-Mining Malware - Threat ...

This increasing public attention did not go unnoticed by cybercriminals who have began unleashing Bitcoin-mining malware. The term "Bitcoin-mining malware" is used to refer to malware that cybercriminals use to install Bitcoin miners in users' systems. These allow cybercriminals to utilize systems' computing resources for their own gain.

What is a Bitcoin and how is it created?

Bitcoin is a form...

Read more


Create online bitcoin account - What is happening to ...

Create a blockchain wallet account for free to store your bitcoins, and then sell for cash. Make Rs.50000 every month with BTC, earn from BTC.Bitcoins on mobile wallets and bitcoin to cash. changing the site to make it possible for us to easily create mirrors to make. register an account,.Presents information from the blockchain, and other bitcoin related statistics, such as pool statistics.For...

Read more


Why Bitcoin is the largest Ponzi scheme in human history ...

Why Bitcoin is the largest Ponzi scheme in human history

With Bitcoin supply constrained and increasingly falling short of demand, instead of functioning as a currency, Bitcoin is a speculative empty asset.

analysis Updated: Dec 30, 2017 08:22 IST

Vivek Wadhwa

ATM machines (L and R) for digital currency Bitcoin are seen in Hong Kong on December 18, 2017. Bitcoins' market price is almost certain...

Read more

Date: 2018-01-30 16:49:43

5+ Best BitCoin Mining Software Free Download For Windows ...


GUIMiner is a software for the Widows user that are interested in bitcoin mining. With this software, users enjoy an easy to use the system with graphical user interface. The software comes configured with the main pools and has the ability to be minimized to tray for easy computer use.

What is a Bitcoin Mining Software?

Essentially, bitcoins is a decentralized form of a currency that...

Read more


Related topics : free bitcoin mining software for windows / easy bitcoin mining software / bitcoin mining software gpu windows / free bitcoin mining software / mining pool software bitcoin

A new legitimate era for Bitcoin | Business | DW | 11.12.2017


A new legitimate era for Bitcoin

Dealing in Bitcoin gets more real as trading in futures contracts of the virtual currency has started on Chicago's CBOE exchange. The subsequent buying frenzy prompted skeptics to again warn of a bubble.

When Bitcoin was first created in 2009 it was only worth a few cents. Since the beginning of the year though, Bitcoin has seen an amazing 15-fold gain....

Read more


Related topics : bitcoin digital currency exchange / buy bitcoin exchange rate / bitcoin price exchange rate / bitcoin currency of the future / virtual currency exchange bitcoin

Northwest’s cheap power drawing bitcoin miners | Business ...


Northwest's cheap power drawing bitcoin miners

HashPlex is one of several bitcoin-mining companies operating or preparing to launch in Grant, Chelan and Douglas counties, which offer very low power rates to industrial customers.


Tom Banse / NW News Network

MegaBigPower CEO Dave Carlson inside what he believes is the biggest bitcoin-mining business in the United...

Read more

Date: 2014-05-11 19:14:02

Stellar Lumens: How to Buy, Sell, Trade or Short XLM in the UK


How Stellar works

Stellar is essentially a matchmaker for currencies and facilitates worldwide transfers and exchanges in any fiat currency and cryptocurrency.

It's much like Ripple . The main differences are more of a focus on simplicity and scalability as well as on functionality to help move money in remote areas at lower costs.

There are three different ways you can do this.


Read more


Related topics : using bitcoin for currency exchange / currency exchange bitcoin to usd / online currency exchange bitcoin / bitcoin currency exchange / make money bitcoin exchange