The main idea of meme coins is to attract attention to something. There are a lot of things to attract attention. For example appear such coins like https://twitter.com/DogeGaySon/status/1488443132718948352 to attract attention to some problems and protect some people rights.
Meme coins depend too much on the conditions of the cryptocurrency market. That is why it is necessary to have a big liquidity and a big loyal community for every meme coin.