How many of those UHNW individuals came from money vs. had to build it themselves? "Wealth does not last beyond three generations" https://www.nasdaq.com/arti

How many of those UHNW individuals came from money vs. had to build it themselves? "Wealth does not last beyond three generations" https://www.nasdaq.com/articles/generational-wealth%3A-why-do-70-of-families-lose-their-wealth-in-the-2nd-generation-2018-10 https://www.nasdaq.com/articles/generational-wealth%3A-why-d...