i get that feeling every time I have to go to school.
Then challenge yourself. It really grinds my gears when I hear people say school is a waste of time.
If truly believe it's a waste of time and that you'll be fiscally (and otherwise) satisfied for the rest of your life without the most rudimentary educational degree there is, then drop out. I, of course, think you'd be far better off staying in school.
If you think school is a waste of time because it's "too easy," then take more difficult courses. It's nearly always possible to take a class independently or at a local university if your high school doesn't offer it.