Things started going well for me when I stopped FOMO addiction in me, now I have few set of rules when buying and selling crypto like..

1. Always create your crypto portfolio in bear market with the exact amount you are ready to throw away for longer time till market start turning green again.

2. Never hesitate to take profits when your coins are look good in your wallet, take profit and wait for stronger dips.

HODL isn't that easy but it's possible if you use that money you aren't going to use on the long run, also HODL is easier if you have other source of incomes.