How many per cent of all USD is held by the 900 richest people in USA?
Definitely not 50%. Should be much less than that amount. The richest 1% (somewhere around 2 to 3 million people) hold 42% of the wealth in the USA. So should be somewhere around 10-20%.
I think in reality is LESS than 900. If I were a fortune teller I would say that it's something close to 90%. Some huge banks and hedge funds have its owners and those owners can look deceptively familiar. Cartel owning fiat currencies and its derivatives is very small and narrow. 95% of $330 trillion in derivatives is held by 4-5 banks. And derivatives + 0% interest rates for chosen ones are the most effective way of wealth re-distribution upwards