Nearly three dozen Detroit students who are a part of the Money Matters for Youth program are preparing to meet billionaire investor Warren Buffett. When the nonprofit's director, financial guru Gail Perry-Mason, recently met Buffett â one of the greatest business and finance minds in the world â he invited her and her budding young investors attend the annual shareholders meeting of Berkshire Hathaway Inc., the multinational holding company he controls as chairman of the board.