The Dow Jones Industrial Average rose to its highest level ever, fueled by the fastest profit growth since the 1990s and easy monetary stimulus from the Federal Reserve's monetary policies. 

"Psychologically, it may give a sense that we have recovered a tremendous amount from the depths of the crisis,” said Wasif Latif, vice president of equity investments at USAA Investments. "On the other hand, it could create a sense of nervousness that we reached an all-time high, so how much more is there to go?"