I remember hearing or reading some form of this story long ago. I associated it with John C Bogle, the man who enabled Iris and me to retire in comfort, but apparently the money quote was said by Joseph Heller:
At a party given by a billionaire on Shelter Island, the late Kurt Vonnegut informs his pal, the author Joseph Heller, that their host, a hedge fund manager, had made more money in a single day than Heller had earned from his wildly popular novel Catch 22 over its whole history. Heller responds, “Yes, but I have something he will never have . . . Enough.”
BTW, I have enough for us but if I had more, there are a lot of people and organizations that I wish I could help out financially.