$BTC Bitcoin (BTC) is the first and most popular cryptocurrency in the world, introduced by an anonymous individual or group known as Satoshi Nakamoto in 2009. Bitcoin operates on a decentralized blockchain platform, allowing peer-to-peer transactions without the need for intermediaries like banks. With a limited supply of only 21 million BTC, it is considered 'digital gold' and a hedge against inflation. Bitcoin is increasingly being accepted widely, from payments and investments to asset storage. However, the price of BTC is highly volatile, and there is still much debate about its legality and sustainability within the global financial system.