Be prepared.
This is a warning to all of you running after meme coins, even if they get listed on top exchanges it doesn't mean they will survive for long, or have you forgotten that many projects got delisted from exchanges after the ICO craze of 2017? The same thing will happen once a tough bear market starts, so many meme coins won't be able to cope with the situation and many exchanges will be forced to delist the tokens.
But it's also much better if they make the decision to delete all meme tokens that have no value and also tokens that fail so that people can also refrain from falling for the meme coin because in the end they will feel lose too.
Deleting memecoins or some other coin doesn't happen based on what type of coin they are, it happens based on the volume. If there is a volume in any coin then they will try their best to keep it there, if there is no value in it then they will not do that at all. Which means that we are talking about a situation where you could make some money or you would not be able to make any money as an exchange.
If there is no volume on a memecoin then they will delist it, but if there is some volume in it then they will keep it because it means money to them. This goes for all the coins and tokens that they list, all they care about the volume and nothing else.