What you do depends on the market condition, there are times that are not really good for HODL. Just like in 2018, it was the worst ever and everyone who was Hodling then is really going to regret that they ever did such. Reason for this is because the market kept on declining. But as for this year, I think anyone can do the both of them which is day trading and hodl as well since the market has been going up and you will be able to make profit from both strategy. Just hold some in your private while you trade with the others.
Just like you said, it all depends on the market condition, do you even know that that same 2018 was also favorable to some people, it was only not favorable for people who bought when the price of BTC hit the ATH, but the same year still favored a lot of people that bought when the price of Bitcoin bottomed that same year and those people now are actually counting their profit instead of losses.
So the point is that we really need to endeavor not to always jump into conclusion without being sure of what we are doing. Most people that fell for fomo then followed trend and not their strategy.