Your options are pretty limited and they include investing into promising alts and waiting for their price to spike. Day trading which means to trade and earn money on price swings tho this is not easy job and requires a lot of skills. There are some companies that will pay you interest on your money although you have to trust then to not run with your money, I've found gambling websites to have an option for you to invest there but again this is not something you should do all time as you have some risks. Go and offer your service for crypto or bitcoin or any other altcoin and by this way earn and generate more.