Bitcoin is a decentralized digital currency with no central issuer. Transactions are confirmed by miners using the Proof-of-Work algorithm (SHA-256). The maximum supply is hard-capped at 21 million coins, and the block reward is halved roughly every 4 years (halving).
Term
Bitcoin (BTC)
The first and most well-known cryptocurrency, launched in 2009 by Satoshi Nakamoto. Its supply is capped at 21 million coins.