Well the question is what's a more appealing place to put your money? Because in the absence of one the stock market by default is viewed as an appealing place which drives up demand for it. You might say well folks should just spend their money and enjoy it instead of putting it in the market but that's a whole different strategy. You might say folks should buy real estate well that's a whole different strategy. You might say folks should sit on cash and bonds and other low-risk assets well that's another strategy. High interest rates actually make cash or at least bank savings rates more appealing than they were 5 years ago... yet folks are still seeking those double digit returns. Can you blame them? What will trigger the downturn will be folks who've overextended themselves on margin forced to sell in order to liquidate assets