Rich people gamble a lot, look at this recent Mayweather Instagram pic:

"In Game 6, #OKC was the favorite to beat the #Warriors... but I bet Splash for the Cash. I bet money line for $170,000 and won $221,000."
This was 221k won in a matter of minutes... rich people gamble so the games feel more exciting. Im sure he loses a lot too, but if you bet big, you can win big.