I think for now, all the Altcoins will likely survive 2021 unless something huge happens and set the space back like 2020 Covid 19 thing. In a bull market even shit of the shit coins pump like crazy, it is you that would be wise enough to know these projects can sustain their price and get out with profit
So many projects were pumped to the moon but these projects were going back to the bottom again. As far as i know the pump will be only for short term period for the crap coin.
The shitcoins will be dumped again while the good coins will remain stable and as far as i see if the market is very selective at this moment too.
People are also going to the coins that had very good fundamental. People will not blindly invest in the crap coins.