This can be an online digital wallet attached to the account where you buy and sell, a program on your computer or a physical device you plug into your computer. It’s a digital currency used mostly for online purchases and as an investment, albeit a very risky one. Thus this limits the threat of theft as a single controller or server cannot carry out the transactions i. Welcome to Buy Bitcoin Worldwide! Luckily for you, this site has ample information to help make buying bitcoins easier for you.