$BTC Bitcoin (BTC) is the original decentralized cryptocurrency, created in 2009 by the mysterious “Satoshi Nakamoto.” It runs on a peer-to-peer blockchain network with a fixed supply capped at 21 million coins and is divisible to eight decimal places. Currently trading around $103k, recent fluctuations reflect broader market sentiment—Bitcoin is up about 58% over the past year, yet acts more like a speculative asset than a safe haven.