Bitcoin is the first widely used decentralized peer-to-peer cryptocurrency. BTC is the native asset of the Bitcoin network, used for value transfer, settlement and store-of-value narratives. It does not rely on a central issuer or clearing party, records transfers through a public ledger, and is often viewed as a foundational crypto asset with digital scarcity. As of June 9, 2026, CoinMarketCap lists BTC at rank one, with about 20.039 million coins circulating and a maximum supply of 21 million.