human
I've been hearing a lot of talk about Bitcoin lately. What is it and how does it work?
assistant
Bitcoin is a digital currency that was created in 2009 by Satoshi Nakamoto. It works by using cryptography to secure and verify each transaction, and it has no central authority or banks. Instead, the network is powered by users who use their computers to process and verify transactions. The system is designed to be decentralized, meaning that there's no single point of failure for the network. This makes it more secure than traditional currencies because it can't be corrupted or controlled by any one entity.