Yeah, but still the cycle will continue, those who have been a victims in 2015-2019 become smarter, but how about those who entered late in 2019? then will not become the victims of this Ponzi scheme until it's too late and then they learn from their mistakes. And then a new set of noobs will come along, thus it is pattern in crypto sphere.
Even experience investors do FOMO from time to time, it's human behaviour, but with their experience, they know when and how to get out, unlike those newbies who think that the price will continue to spike without any corrections along the way.
There'll be always a FOMO its depends on us how we face it. Nowadays peoples are smart and they can easily tell the difference between the Ponzi scam and real investing based companies. They learn from their mistakes and today they're smart. Now Fomo is only for those who have less knowledge of bitcoins like newbies when they step-in bitcoins world a lot of Ponzi scheme try to scam them.