Stocks keep marching higher, to stable yet irrational levels, because the .1% need to put their money somewhere. That level of wealth grows so quickly that it's impossible to know what to do with it. A literal embarrassment of riches.
Don't get me wrong, I want to be in that category, but still.. this is our reality. It's an interesting experiment we are running. Without external factors like global wars and climate catastrophe, could the market even crash in our current environment?