The answer is simple, those meme coin projects that bring actual utility for their communities are going to stay because they are going to have use cases and people will keep using them in the future as well, and meme coins that have no utility at all and have no projects or functionalities backing them up may gain temporary hype and gain some value but they will eventually die and will be replaced by new ones.

However, despite all these things, I wouldn't recommend anyone spending a lot of money on meme coins hoping that they are going to get rich by doing this because even if a meme coin has a project backing it up, it will still contain a lot of risks and one should only invest a small amount in it to try their luck so that they don't lose a lot of money.