Though it’s impossible to call market tops, you can be prepared. One of the warning signs right now is that the CAPE is at a record high not seen since the Dot Com bubble in the 2000. If I were you, I’d get my asset allocation right by having a right mix of defensive assets like debt, gold etc.
Some poeople tend to sell everrything and hold cash, which is stupdity. Because the thing about holding cash is that you need get it right 2 times. You need to call the peak and the bottom and even the smartest suck at that.