[ben_w]

I think you gave it backwards; mere tens of millions is enough to collect wine and antiques for your sixth house, while almost all “billionaires” are in that category purely by virtue of their leading control of large corporations.

(I’m sure there are other examples, perhaps inheritances, but the only non-leadership billionaire I can think of in any field off the top of my head is Rowling).

[vehemenz]

That is my point. A billionaire should be done with material hobbies while they are a still millionaire.

[wizzwizz4]

There's a difference between a ruler and a leader.