No one can precisely predict the time of bubble burst. There are still many ppl who are buying up and ignoring the looming risk. They are attracted by the profit.
Trying to predict when the bubble will burst is a recipe for disaster. When you recognize a bubble, it's time to get out. That doesn't mean that you have to exit the market completely. You would definately want to get out of you cyclical stocks though. Especially if a large chunk of their shares are held by institutional investors.
All bubbles eventually burst and its a pretty good idea to have a good cash position when it finally bottoms out to take advantage all the bargains available. So a partial liquidation of one's position wouldn't be a bad idea.
Just hanging on and riding the bubble looking at the long term won't help either. All that will do is erase a decades worth of gains like it did in 2008.