Bitcoin is a type of digital currency that operates on a technology called blockchain. It was created in 2009 and allows people to send or receive money over the internet without the need for a third party, like a bank. Bitcoin can be used to buy products and services, or traded on exchanges for other currencies. Its value can fluctuate greatly, making it a popular investment choice for some people. Some view Bitcoin as the future of money, while others see it as a risky and volatile asset.