Forty-year-old professional boxer Floyd Mayweather will earn at least $100 million for his upcoming match with Conor McGregor, based on some estimates. While that may not seem like a lot compared to, say, Snap CEO Evan Spiegel — who became a billionaire six times over after taking his disappearing photo company public — that $100 million would represent a sizable chunk of Mayweather’s wealth.…
