20. Floyd Mayweather

One of the highest-paid athletes in the world, Floyd Mayweather, owns a Koenigsegg CCXR Trevita. The ultra-modern car manufacturing company, Koenigsegg, built only two units of this that specifically designed for the super-rich — which makes the CCXR Trevita the perfect car for the popular world boxing champion.
Floyd Mayweather paid a whopping $4.6 million to own this hypercar, which he later sold for an undisclosed price. With one of the fastest-growing collections in the world, the boxer also owns a fleet of expensive cars in Miami and Los Angeles.