$BTC
Bitcoin (BTC) is a decentralized digital currency that was invented in 2008 by an unknown person or group using the name Satoshi Nakamoto. It was introduced in a whitepaper titled "Bitcoin: A Peer-to-Peer Electronic Cash System." Bitcoin operates without a central authority or banks and uses blockchain technology to record transactions on a public ledger. Users can send and receive bitcoins over the Bitcoin network using digital wallets. The supply of Bitcoin is limited to 21 million coins, which adds to its scarcity and value. Bitcoin is known for its volatility but is widely seen as a revolutionary innovation in the world of finance.