As long as CZ was with Binance, there were very few coins listed on Binance and the ones that were listed all performed well in the market. But Binance currently has a large number of coil listings due to which not all coins are doing well. Therefore, investors' confidence is slowly decreasing towards Binance listing coins. meme coin is currently in abundance and listing on good exchanges so we would be foolish to expect anything good from all coins. Because these are meme coins made just for fun. So they will never be able to maintain a large marketcap for long
It depends on the longeractvity of the memes to an individual, or institutions or organizations perspectives. for example, certain individuals has invested on some meme coin on the long term, like Elon Musk on the Dogecoin meme project.
There are Memecoins that has been here for 5 years counting, while many are new but with potential to grow in future. Memes are for funs but have become investors preferences this days.
As for marketcap, some meme coin are already maintaining marketcap, like Dogecoin, Shibainu, Pepe etc, you may check dogecoin marketcap for the past three years.