$BTC

Bitcoin (BTC) is the world's first decentralized digital currency, launched in 2009. It uses peer-to-peer technology and cryptography to secure transactions. Transactions are recorded on a public ledger called the blockchain. Bitcoin is limited to 21 million units, making it a scarce asset. It's considered a store of value and a medium of exchange. Bitcoin's price can be volatile, but it's gained widespread acceptance and is now traded on various exchanges worldwide. Its market capitalization is over $1 trillion.