Bitcoin was launched in 2009 and is the largest cryptocurrency, invented anonymously in 2008. Each bitcoin exists as a computer file stored in a digital wallet. All bitcoin transactions are recorded on a public ledger called the blockchain. New bitcoins are introduced through bitcoin mining, a process where computers solve complex math problems. While some countries and companies accept bitcoin, the legal status varies and regulatory bodies have expressed concerns about its unpredictability. In 2021, El Salvador became the first country to make bitcoin legal tender, approved by a supermajority in its legislative assembly. The president believes this will boost financial inclusion and bring investment and economic opportunities to the country.