Assuming that all of the equities held by the bottom 99% are invested in retirement accounts, it would be 50.1% of the market. [https://www.federalreserve.gov/releases/z1/dataviz/dfa/distribute/table/#quarter:140;series:Corporate equities and mutual fund shares;demographic:networth;population:all;units:shares]
I did the same with my IRA. I was in VOO but moved to VGK and some short term bonds. So far I’ve saved myself a good amount of money.