Prostitution? But even that isn't going to hit $2.5 mil in three years. More likely, you'll need to make all 2.5 mil in your third year, and spend the first two

Prostitution? But even that isn't going to hit $2.5 mil in three years. More likely, you'll need to make all 2.5 mil in your third year, and spend the first two building yourself up. You could try doing some tricky loophole pyramid scheme stuff using cryptocurrencies like Bitcoin? But that's also pretty scummy.