Here you have Professor Irving Fisher after the 1929 Market Crash explaining that stocks were not actually too high; it was just that people were going into debt in order to invest. Right and wrong. Stocks were too high and there was too much investment that involved debt.
And here we are eighty years later and we all know who took on too much debt in order to make bundles of money. How come you didn’t you listen to Professor Fisher, financial wizards of Wall Street? Perhaps because you were able to take the money and run? (Or not even run. Just wait for another bonus as the smoke cleared.)