Bitcoin (BTC) is the world's first decentralized digital currency, created in 2009 by an anonymous entity known as Satoshi Nakamoto. It operates on a peer-to-peer network without central authority, like banks or governments. Transactions are recorded on a public, immutable ledger called a blockchain, secured by cryptography.
New bitcoins are "mined" by powerful computers solving complex puzzles, a process that validates transactions. Bitcoin's finite supply (capped at 21 million) and decentralized nature have made it an attractive investment, often compared to "digital gold." Its value fluctuates significantly, influenced by market sentiment, regulatory news, and geopolitical events.