Old money, smart money-management, success in the entertainment world, creative inventions or young hustlin'. That's what it takes to bank billions.
Forbes magazine has released its 30th annual ranked list of the richest people on the planet, and counted 1,810 billionaires globally, down from last year's record of 1,826. Altogether, they have $6.48 trillion, down $570 billion from last year. Bill Gates remains the richest person in the world, with a net worth of $75 billion, Forbes found. The youngest billionaire in the world is Alexandra Andresen, a 19-year-old Norwegian heiress and horse-riding champion whose family wealth is rooted in tobacco.