Deep regret was not selling anything in 2017. My life could had been completely different at the moment. It has become something that will probably be a life long regret.
I also experienced the same feeling as you in the past, and really if I sold earlier, my life would be a lot different now.
I think people still have the opportunity to invest now if they consider carefully because there are many cheap coins for you during this time. In my opinion, the market will soon return like 2021, and it will get better and better as people tend to invest in this market a lot.