I don't see how this could all not fall apart. It seems like the divergence between the stock market and the rest of the economy, is going to be the biggest bubble that has ever been. Personally, I think it's going to be the end of the US dollar.
https://www.investopedia.com/terms/p/permanent-portfolio.asp
Companies that are more profitable have higher value stock - increasing the demand for it, no?
Case in point: https://news.ycombinator.com/item?id=23529088