human
I've heard a lot about Bitcoin. What is it and how can I use it?
assistant
Bitcoin is a digital currency that was created in 2009 by Satoshi Nakamoto. It works by using cryptography to secure and verify transactions as they occur, making them virtually impossible to counterfeit or double-spend. Bitcoin can be used to buy goods and services online, send money across the globe quickly and cheaply, and store value securely.