Assuming that the financial market is going to hell, and the dollar value is going to be inflated into oblivion....then it might be tru that buying a share in a company might be one of the few real things to eventually retain value, like real estate.
Or not.
During the German hyperinflation, stocks preserved purchasing power very well. Also, the Zimbabwe stock market has been among the best performing stock markets the past few years in US dollar terms.