I knew a guy who made a boatload of money off of the dotcom bubble. He kept doubling down and doubling down, then at right about the peak he told himself "I have as much money as I'll ever need if I cash out now. There's no reason to take any more risks." In other words, he timed it perfectly (based on his own situation - he wasn't genius and he would freely admit that) So here he was, a multimillionaire who'd spent…
Obviously there are people who can't do this (Zuckerburg, and plenty of much smaller examples too) but I don't see why, if you have the choice, you'd let people know how rich you are. Of course, unless you live the life of someone much poorer people can always guess ("hey, nice house you've got there..."), but people who talk about how rich they are, or show off with the money... just seems stupid to me.
I've thought a lot about what I would do in that position, and came to the same conclusion you did. The right thing to do probably would have been to move far away, live simply, and take up a hobby so he could meet people on an equal footing.
Of course, it's easy to decide how other people can fix their lives :)