The guy is 80 and still working, worth the GDP of many nations...what's the point of making MORE money ?
If I were him I would have long deserted society at that age and wealth...really...what's the point ?
Time for something different, idk...feed an entire nation for a year, help make water accessible to people that do not have ANY in poorer countries...something of value, not make more money off GS warrants on the back of tax payers...come on.