It comes down to human greed. A guy makes 1/4 billion, legally or not. How much can he spend in a lifetime? It doesn't matter how much he can spend, he still wants more. Look at our pro athletes, making millions a year. They can't spend it all but its a game, a matter of making more than the next guy. Look at our high tech billionaires, Bezos, Gates, and the rest, incredibly wealthy but still fighting for more. There's never enough. You've heard the old saying about the millionaire who died. "How much did he leave? All of it."
It's mostly about the power that the money brings. There are, however, lots of ways they spend it. I can link you to monoblock audio amplifiers that cost $37,000 each, and speakers that run north of $500K.
You gotta have the best and most refined for your Manhattan penthouse and your estate in the south of France.
