Does being your own self-made billionaire ipso facto qualify you for politics?

I think arguably the fact that Bloomberg was beholden to nobody helped him run NYC effectively. But he also had brains and expertise. A lot of folk seem to think that just because Trump is rich and a blowhard, he is qualified to run this country. It could be argued that he is the uber-oligarch. (You can see I have no opinions on this.) Your thoughts?