Bitcoin

Bitcoin is a peer-to-peer digital currency secured by proof-of-work consensus, where distributed nodes validate transactions and produce new coins through mining. The network settles value transfers without intermediaries, with a fixed supply cap of 21 million coins and a halving schedule that reduces issuance predictably. Transaction finality occurs on-chain within blocks, though layer-two protocols like Lightning Network enable faster settlement for smaller amounts.

Traders monitor Bitcoin as the sector's primary price discovery mechanism and correlation anchor—most altcoins move directionally with BTC. Its spot and derivatives markets (futures, options) across major exchanges provide unmatched liquidity and leverage depth, allowing large positions to be opened or unwound with minimal slippage. Supply dynamics drive trading theses: mining difficulty adjustments, halving cycles, and wallet accumulation patterns by major holders inform medium-term positioning. BTC also functions as a funding rate benchmark in perpetual futures markets, affecting capital flows across the broader crypto ecosystem.