$BTC
Bitcoin is a decentralized digital currency that operates without a central authority, such as a government or bank. It was invented in 2008 by an unknown person or group of people using the pseudonym Satoshi Nakamoto and introduced in 2009. Bitcoin transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called the blockchain.
Bitcoin is often referred to as a cryptocurrency because it uses cryptographic techniques to secure transactions, control the creation of new units, and verify the transfer of assets. Unlike traditional currencies, it is not issued or regulated by a central authority, which gives it a degree of independence from traditional financial systems.