I mean aside from bitcoin and maybe ethereum, I do not think that anything is important for the crypto world, doesn't feel like it would be a must. Memecoins are of course not important at all, all the things they claim to do for the market was done before the meme ones to other stuff, they are not brining extra new money, and even if they do, then it is a small amount that is insignificant that would not be missed.
All in all, I believe that we should not be really considering them as important at all, we should consider them as something that is useless and just happens to be a bug in the system. They do hurt a lot of peoples economy as well, their price gets inflation by few tokens at start, and then crash when all the tokens are released, making people lose money hand over fist.
Memecoins are exactly how you mean, but it is not true for just any coin. All those others, bnb, sol, matic, ada, and many others like that are still quite important for the crypto world and they are not that small. I am not saying that they are the only ones that matter, but I think it is quite important to realize that we are going to end up with something that will take a while, and we should be careful about it.
I personally believe that the best thing to do right now would be just focusing on how to grow, and that means we are not going to get anything that will change stuff too much, and in that situation I feel like we are going to actually make a good income from it if we know what we are doing, will definitely help you in the end.