Bitcoin is a form of digital currency, created and held electronically. No one controls it. Bitcoins arenâ€™t printed, like dollars or euros â€“ theyâ€™re produced by people, and increasingly businesses, running computers all around the world, using software that solves mathematical problems. Itâ€™s the first example of a growing category of money known as cryptocurrency. Watch: [video=youtube;Gc2en3nHxA4]https://www.youtube.com/watch?v=Gc2en3nHxA4[/video] [h=2]What makes it different from normal currencies?[/h] Bitcoin can be used to buy things electronically. In that sense, itâ€™s like conventional dollars, euros, or yen, which are also traded digitally. However, bitcoinâ€™s most important characteristic, and the thing that makes it different to conventional money, is that it is decentralized. No single institution controls the bitcoin network. This puts some people at ease, because it means that a large bank canâ€™t control their money. [h=2]Who created it?[/h] A software developer called Satoshi Nakamoto proposed bitcoin, which was an electronic payment system based on mathematical proof. The idea was to produce a currency independent of any central authority, transferable electronically, more or less instantly, with very low transaction fees.