Earlier quoted context omitted.
the median net worth of a US household is $121,411. you have to go down into the bottom quartile to find households with a net worth under $10k. most americans absolutely have enough money to make investments relevant. https://dqydj.com/average-median-top-net-worth-percentiles/
I would assume that that ‘net worth’ is mostly caught up in housing, and very much not available for investment.
The data consistently indicates that Americans have significantly more ability to invest than the impression many people seem to have.