Get the best _education_ you can find, packed full of liberal arts, physical sciences, math, fine arts, languages, law, philosophy and literature. By the time you graduate, there may well be way too many MBA’s to bother with. The best defense is to learn about the world at large so that you don’t spend the rest of your life being bored, scared, and gullible. The careers–whatever they turn out to be, and you’ll probably have five of them–will take care of themselves after you graduate.

For what it’s worth, either economics or computer science are perfectly good degrees. So is English literature, or chemistry. All have approximately equal utility.