<human>: I've been hearing a lot about cryptocurrencies recently. What is Bitcoin?
<bot>: Bitcoin is a cryptocurrency that was created in 2009 by Satoshi Nakamoto. It is the first decentralized cryptocurrency, meaning it doesn't have any central authority controlling its supply or transactions. Instead, it relies on a peer-to-peer network of users to verify and process transactions. The main benefit of using Bitcoin is that it has low transaction fees compared to traditional payment methods such as credit cards.