$BTC Bitcoin, is the first and most popular cryptocurrency in the world. Created in 2009 by an anonymous person or group called Satoshi Nakamoto, it introduced a new way to send and receive money online, without relying on traditional banks. Bitcoin uses a technology called blockchain, making every transaction secure and transparent. Its supply is limited to 21 million coins, making it a rare digital asset. Today, $BTC is used by millions of people as an investment, a hedge against inflation, and a symbol of how digital currency can change the global financial system for the better.