Ten years ago, a mysterious computer programmer invented a new type of money that wasn't backed by any government or kept in any bank. There were no coins or bills, just long strings of letters and numbers stored inside a network of computers that anybody could be a part of by downloading some free software over the Internet. Today that computerized currency, bitcoin, is well-known, though little understood, and bitcoin's popularity has inspired the creation of thousands of other types of digital money, known as "cryptocurrency." Over the last decade, you could have made a five million percent profit by investing in cryptocurrency. Or you could have lost everything. It has been a wild ride, and few people have experienced the highs and lows more than a 29-year-old named Charlie Shrem.