$BTC

BTC, or Bitcoin, is the first decentralized digital currency in the world, launched in 2009 by a person or group known as "Satoshi Nakamoto." Bitcoin operates without a central intermediary (such as banks) and relies on blockchain technology to secure and transparently document transactions. It is used as a store of value and a means for global transfers, and is sometimes referred to as "digital gold" due to its limited supply (only 21 million units). Its value fluctuates greatly, making it a point of interest for investors and speculators.