Somewhere between 55-60% +- of Americans are invested in the stock market. This does not include the millions of Americans who must rely on the stock market for the funding of their pension plans, (94% of public and 18% of private sector workers (not including current retirees). Pension plans hold over $8 trillion in investments.
They all participated in the bull market just as the billionaires did.
There is no reason the great majority of all Americans cannot also participate. Many funds have a very minimal initial investment requirement.
I have no doubt that I can find money to invest by diverting money from unnecessary and frivolous spending in 80% or more of American households.
The rhetoric spewing from politicians that only the wealthy have benefited at the expense of working families is misleading and inaccurate. It’s propaganda designed to divide Americans.