The main reason the market is where it is, is the fed with it's 0 interest rate debacle. In a normal market there are a measurable percent of people who buy bonds and other fixed investments. Now these type of securities pay nothing, some actually have negative returns. The $$ that would go into these things still exist and must go somewhere.
The fed has created a box for itself. Sooner or later, the fed rate must go positive. Any such move will cause a market dip, depending on other world conditions, it could cause a major correction. A 10% correction is not far fetched. The 07 crash was a combination of events, topped off with the results of the 08 election. We are now heading for a similar place.
IMO, we are overdue for a recession. back in 07, there individuals who predicted the crash and had went to all cash.
Dang, I wasn't finished.