Bitcoin (BTC) is a decentralized digital currency introduced in 2009 by an anonymous entity known as Satoshi Nakamoto. It operates on a peer-to-peer network without a central authority, using blockchain technology to record transactions transparently and securely. Bitcoin is often referred to as "digital gold" due to its limited supply of 21 million coins and its appeal as a store of value. It can be used for purchases, investments, and transferring money globally with minimal fees. Despite its volatility, Bitcoin has become a symbol of financial innovation, challenging traditional banking systems and influencing the development of cryptocurrencies worldwide.