"Stay away from bitcoins,"  Warren Buffet said. I was curious that he understood the idea of the power of a very good brand, but he discounted the bitcoin brand. Bitcoin is the last item in which about the feature set you can copy it exactly (litecoin, etc). Currently, bitcoin is not over, so please be patient until Bitcoin finishes, then give us some subjective comments. It's easy to look back and see the profits of big technology companies and say that it has no dumb investment, but you will have to know enough to choose those companies in the hundreds of failures.