it depends. if you want to be really independent he could probably get capital from a day trading type firm. dont know how easy that is these days. its tough though and generally you only get paid if you earn it.
i suppose if you want a trading job at a big firm with a real salary you probably want to get a degree in finance or economics.
At an independent type firm it wont really matter. but studying the market by reading the wsj, forbes, etc. is good for this. econ or math are probably good majors for this type of thinking.