I do nothing for the altcoins I have in my wallet. I wait for its time to rise again, even though I know it will take time. And right now, many of those altcoins are dropping in price but I'm fine. But I'm still trying to buy more for those coins that have a chance to increase again. Hopefully, some altcoins can improve so I can be as profitable again as before. Now I still want to collect more bitcoins because they are still at a reasonable price for me.
We have no choice but to hold as any altcoin is currently down 80%-90% in value, selling now is pointless. And I doubt our altcoins, whether they will recover or not, is still a question, as not every coin can recover and reach ATH like bitcoin or ethereum. I think you should stop DCA for altcoins, it would be better to just focus on bitcoin, with a lot of altcoins crashing, I don't think altcoins should be trusted at the moment.