Why you should buy the American Dream at the point of maximum pessimism

Famed investor Sir John Templeton always recommended investing at the point of maximum pessimism. This principle emphasizes that the optimal time to invest and find opportunities is at the bottom of the market and during a crisis, when people are most pessimistic or a stock seems to be undervalued. 

People might say that the American Dream is at the point of maximum pessimism. Economists who relate the American Dream to "social mobility" claim that, because fewer people are out-earning their parents now as compared to the 1940s...