Not so sure about that. Apart from George Soros I don’t know of any multi-billionaire with whom you could have an interesting conversation about the pre-Socratics, the whys and whens Antiquity “fell” (my bet is on the early 600s in the time of Heraclius) or how interesting some of the Huguenots were when they were writing about killing tyrants. Most of the billionaires are rightfully more interested in expanding or at least keeping their wealth, and that is orthogonal with knowing and talking about really interesting stuff. But that is old news already, Plato had written about it ~2,400 years ago.