He sold gum, he sold Coke bottles, he sold magazines, he worked in a grocery store, he delivered newspapers, he sold golf balls, he sold stamps, he detailed cars, he invested in stock, he invested in land, he went to business school, he worked as an investment salesman, he worked as a stock analyst, he worked as a general partner, then chairman, then CEO at a company.
The lucky opportunity was 82 years to compound returns.
The question is why he wouldn't quit at 50 with a few hundred million and live off of the money instead of spending the next 42 years making more money which he will then give away to someone else to decide what to do with after he dies.