$BTC Bitcoin is a digital currency that was created in 2009 by an unknown person or group using the name Satoshi Naka moto. Unlike traditional money, Bitcoin is not controlled by any government or bank. It works on a technology called blockchain, which is a public digital record of all transactions. People can send Bitcoin directly to each other over the internet, anywhere in the world, with lower fees and without needing a middleman like a bank.
Bitcoin is often called digital gold because it is limited in supply—only 21 million Bitcoins will ever exist. This limited supply is one reason why its value can rise or fall sharply. Some people use Bitcoin as an investment, hoping its price will increase, while others use it for online payments. However, Bitcoin is also risky because its price is very volatile and it is not yet accepted everywhere.