There is just so much more money around that has to be invested but cannot be used; the recent high in the stock market is not just based on the business cycle and traditional productivity/population growth.
If this is your take on the stock market's dramatic rise beyond 2008, then investing further in stocks and indexes may still be the thing to do even if it feel we're getting ripped off on the price.
1. https://fred.stlouisfed.org/series/WALCL 2. https://fred.stlouisfed.org/series/BOPGSTB