Once you locate a seller, you meet up in-person and conduct the trade. Both products are capable of mining Bitcoin, Litecoin, Ethereum, and Dash, and Bitharp quotes the following hash rates for the products, in terrahashes and gigahashes per second. And in the great depression. So why have so many people put their money with these companies? Now remember, these investment banks literally hire the best minds in the industry, and spend millions a year on the top research around the world.