David is looking to get into cryto currency mining. Leo says that it's largely not economical to mine bitcoin because of the amount of electricity you need at this point. But other currencies like Helium, Dogecoin, and Etherium are more economical. It also costs to get into it, because you have to invest in the equipment. So don't expect to get rich off it. At least not in the short term. Don't think you can get rich quickly. But then again, nobody thought that Bitcoin was going to be as huge as it is.