Bitcoin

Bitcoin is a peer-to-peer electronic cash and settlement network launched in 2009 by the pseudonymous Satoshi Nakamoto. It runs on a public blockchain maintained by a global network of miners and full nodes, with no central issuer. BTC is the native unit used to transfer value and pay transaction fees. Its defining feature is a hard-capped supply of 21 million coins, which frames it as scarce digital money and a store of value rather than a corporate equity or yield product.

Transactions are grouped into blocks roughly every ten minutes and confirmed through proof-of-work, where miners spend electricity to find valid hashes. Difficulty adjusts automatically to keep block times steady. New BTC enters circulation as a block subsidy that halves about every four years, tapering issuance toward the 21 million ceiling. As subsidies shrink, transaction fees become a larger share of miner revenue. Security rests on the cost of accumulating majority hash power, making history economically expensive to rewrite.

Bitcoin's price reflects the tension between fixed, disinflationary supply and shifting demand. Halvings cut new issuance and have historically preceded volatility. Spot ETF flows, corporate and sovereign treasury adoption, and macro conditions such as real interest rates and dollar liquidity all move demand. On-chain metrics like exchange balances and long-term holder behavior signal conviction. As the largest asset, BTC also sets the risk tone for the broader market, so its price often leads altcoin cycles.

Bitcoin is highly volatile and has fallen sharply from prior peaks multiple times. Regulatory changes, custody failures, and exchange insolvencies can cause losses unrelated to the protocol itself. Mining concentration and energy-policy scrutiny are ongoing concerns, and long-term security depends on fee revenue replacing shrinking block subsidies. It produces no cash flow, so valuation rests on adoption and sentiment rather than earnings.