Warren Buffett Is A Billion-Dollar Investor. He Is Also A Philanthropist. Buffett Is Considered One Of The World’s Greatest And Successful Investors. As Chairman and Chief Executive Officer of Berkshire Hathaway Inc. Take Look inside the Daily Routine and Simplest Lifestyle of World’s Third Largest Billionaire 87-Year-Old Warren Buffett, Who Loves McDonald’s, Spends 80% Of His Workday Reading, And Unwinds by Playing the Ukulele. Warren Buffett: How Warren Spends His Day: Wakes Up At 6:45, Reads Paper At Home, Often Doesn’t Make It Into The Office.