Yes, I think who survived the crisis already learned a lesson... At least I learned my. In a hard way, unfortunately.
You are not alone, brother. Do not be so sad. As for me, I have understood that it is always better to invest in many altcoins, and do not spend all the money that you have to buy the cryptocurrencies.
All those who did not sell got a very good life lesson, I did not have a lot of money in cryptocurrency, so I did not lose much.