Why the first trillionaire matters less than you think
The milestone will generate enormous headlines, but it's mostly symbolic. Net worth at that scale is almost entirely unrealized stock gains — shares that would crater in price if actually sold. The "trillionaire" will be someone whose companies the market values enormously, not someone with a trillion dollars to spend. (See what market cap actually measures.)
The more interesting question is structural: it took until 2018 for the first trillion-dollar company; the first trillion-dollar person will likely arrive within a decade of that. Wealth concentration is accelerating faster than company formation.