I think this is very insecure. Because you are not involved and you do not know which one is working, you can only give the money to your friends. I think this might as well go to ICO, at least you can choose, select their own approved projects.
Bitcoin is not a kind of currency, in fact, it is not managed in a monetary way. And bitcoin is a particularly volatile commodity whose inventory is fixed and if it is to be used as a gambling investment, it must be prepared for a loss because people know little about its price.