$BTC Bitcoin (BTC) is the first and most well-known cryptocurrency, launched in 2009 by the pseudonymous creator Satoshi Nakamoto. It introduced the revolutionary concept of decentralized digital money, operating without a central authority. Built on blockchain technology, BTC allows peer-to-peer transactions that are secure, transparent, and irreversible. Over the years, Bitcoin has evolved from a niche digital currency into a globally recognized store of value—often called "digital gold." It's widely used for trading, investing, and as a hedge against inflation. With limited supply (21 million coins), increasing institutional interest, and growing adoption, BTC continues to shape the future of global finance.