Wall Street to Business and Politics

Which career will best prepare me to start my own business later on ??Which careers  which will enhance my communication,deal making ,investment skills ,strategy etc without pigeonholing me and provide great learning oppourtunities and entreprenerial skills. 

I'm not after quick money and prefer slow and steady way of building a business empire and I'm a life timer,I don't desire to retire anytime and I dont intend to climb the corporate ladder.

I'll also try my luck in politics .