Looking at most of the things that have been said by the OP, it can only be applicable to someone who knows how to trade, who can identify a bottom and a market about switching trends, who would obviously know when to sell and all of that.

Generally, this is a decision a bunch of people may not be able to make since they have little or no knowledge to some of the ways they can make this a reality which in this case, and like you said, the best thing is to just HODL what you have, buy and keep buying as the market keeps going down and never dropping the HODL idea from your head in any case.

As long as you are not joining FOMO and you are not panicking as a result of FUD to sell at loss, but rather take advantage of a bleeding market, then you will be fine.