$BTC Bitcoin ($BTC) is the first and most well-known cryptocurrency, created in 2009 by the pseudonymous developer Satoshi Nakamoto. It operates on a decentralized blockchain network that records all transactions transparently and immutably. Unlike traditional currencies, Bitcoin is not controlled by any central authority, making it censorship-resistant and global. Its total supply is capped at 21 million coins, contributing to its scarcity and appeal as "digital gold." Bitcoin can be used for peer-to-peer transactions, store of value, or investment. Its price is highly volatile and influenced by market demand, regulatory news, adoption trends, and macroeconomic factors like inflation or interest rates.