Blockchain and Bitcoin Fundamentals*Learn the key elements of blockchain and Bitcoin in this bestselling video course and accompanying PDF glossary.Go To Course …* Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthusiasts. It only takes a minute to sign up. For the uninitiated, Bitcoin is one of the few cryptocurrencies with limited supply. Bitcoin inventor Satoshi Nakamoto capped the number of Bitcoin at 21 million, to make the cryptocurrency scarce and contr