$BTC
Bitcoin is a decentralized digital currency, invented in 2009 by an unknown person or group using the name Satoshi Nakamoto. It allows peer-to-peer transactions without intermediaries like banks or governments. Built on blockchain technology, Bitcoin records all transactions in a public, immutable ledger. It is powered by a network of computers (miners) that validate transactions and secure the network using proof-of-work. Bitcoin has a fixed supply of 21 million coins, making it scarce and often compared to digital gold. It has sparked global interest in cryptocurrencies and blockchain, influencing finance, economics, and technology in profound ways.