IMO you CAN predict, but with the busts it's not like there's a set timeline, it usually takes a sudden dip in confidence, some of which we are seeing right now, but nobody ever in humanity has gone all out just because we are questioning whether there is a bubble. So some kind of major scandal and catalyst where everything goes wrong at the same time or etc.

it likely won't burst even if everyone agrees that there is a bubble, it's only when things are so ridiculous that you literally must be hallucinating to believe whatever you're believing

so far there's still plenty of hype and partying.

just my 2 cents