$BTC Bitcoin (BTC) is the first and most well-known cryptocurrency, created by Satoshi Nakamoto in 2009. It introduced decentralized digital money and blockchain technology to the world. With a fixed supply of 21 million coins, Bitcoin is often called “digital gold.” It’s widely used for investment, payment, and as a hedge against inflation. Despite market volatility, BTC remains the foundation of the crypto market and a symbol of financial freedom and innovation.