I think many altcoins are at their bottom or almost there and it is high time to accumulate some coins. Some of the older coins might have some potential to perform well in the upcoming alt season, but I am more focused on new coins. I agree with your thinking that it is more profitable to invest in newly launched (after the 2021 alt season) coins than flagging a dead horse. I purchased a few coins approximately a month ago when the market dipped and have shortlisted a few more potential coins in case we see another dip in the coming days.
I feel like there is no good logic behind putting all your eggs in a basket, and that is why if you want to buy some new ones then it is your call and if you want to then you can do that. But, we should be considering the factual situation where it is not going to be possible for that to mean something, it shouldn't be that much of a big deal at all.
We are going to end up with something that will take a while, but that doesn't mean that we are going to see something changing closely. Just keep up with old coins too, they are not much down but they are good and old and been here before and they can go up, so there is a good reason to accumulate more of them. It's the right choice and we could make that work somehow.