which is why you shouldn't be selling in the $19000s either!
It depends on the event and the time frame. It was clear that the futures markets were the driving force behind the bull run of last year, and it's just as clear that traders like to sell news when possible, and it happened.
you're talking about the context of a blow off top after a bubble. that's completely different than hodling now just to sell $19k in the
next bubble in a year or three. that's what the discussion was about.
i have to say, i disagree that futures were "the driving force behind the bull run of last year". the altcoin market was bubbling long before bitcoin futures were on the table. if anything, it was the fundamental uncertainty about segwit activation being resolved that catalyzed the underlying bullishness of the BTC market in august.