Well, if you get started on that money making scheme now, it will be easier to convince your parents you can support yourself when you announce to them that you're not going to attend college. Of course, if you've made a bunch of money you won't need their approval.
However, if your "making a bunch of money without an education or job" plan doesn't pay out quick enough, or involves living in your parents' house while they bankroll your fledgling business, then you will have a very hard time expressing your goals in a way they will find agreeable.