$ETH Bitcoin (BTC) is the first and most well-known cryptocurrency, created in 2009 by an anonymous person or group using the name Satoshi Nakamoto. It operates on a decentralized network using blockchain technology, which records all transactions publicly and securely. Unlike traditional currencies, Bitcoin isn’t controlled by any government or bank. It is mined using powerful computers that solve complex mathematical problems. Bitcoin is used for peer-to-peer transactions, investments, and as a hedge against inflation. Its limited supply of 21 million coins adds to its value. Over time, it has gained popularity as "digital gold" and revolutionized the financial world.