I don't think we'd say they became billionaires through index funds, we'd say they became billionaires by inheritance or by growing a business.
For how many billionaire's does that happen to be true?
If that's true for nobody than comparing Trump to nobody doesn't make much sense.
For how many billionaires does what happen to be true?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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