$BTC Bitcoin (BTC) is the first and most well-known cryptocurrency, introduced in 2009 by an anonymous entity known as Satoshi Nakamoto. It operates on a decentralized peer-to-peer network, using blockchain technology to record transactions transparently and securely. Unlike traditional currencies, Bitcoin is not controlled by any government or central bank, and its supply is limited to 21 million coins, making it a deflationary asset. Bitcoin is often referred to as "digital gold" due to its store of value properties and increasing adoption as an investment hedge. It enables fast, borderless transactions with low fees, attracting users globally for both personal and institutional use. Bitcoin is mined through a process called proof-of-work, where powerful computers solve complex mathematical problems to validate transactions. Over time, it has become a cornerstone of the cryptocurrency ecosystem, influencing financial markets, inspiring thousands of altcoins, and playing a key role in the rise of decentralized finance (DeFi).