Investing legend and Vanguard Group founder John C. "Jack" Bogle died this week at the age of 89. While his personal fortune was valued at a whopping $80 million and "he regularly gave half his salary to charities," the New York Times reports, he wished he had done one thing differently.

"My only regret about money," Bogle said in 2012, per the Times, "is that I don't have more to give away."