ethereum is a good altcoins but i don't see them transparent in development, even the rumored eth 2.0 will launch, not even launch as of today. In my opinion, the criteria as a good altcoin are having a large community, high security and adoption.
actually there's a lof of altcoins with large community in the space but sad to say despite, most of them are still not worth it because they always end up very stagnant after all. So if we were talking about long term then for me its no other than ethereum as its very reliable ,trusted and very secured when it comes investment.
Community doesn't change the price of it, money does. Which means that if you have 100 super rich people interested in a project, versus 1 million super poor people, there will be differences because rich could take it high or at least keep it there with their money while poor can't do anything. Why do you think Axie got lower? There were plenty of people following it, but the reality is that all of those people just wanted to play and earn money and then sell their earned money that's it.
There weren't plenty of rich that would buy that, and grow their numbers. Sure if you were a wealthy person you could have bought plenty of axies and let your workers earn you money, but those same workers caused the price to go down when they sold as well.