Most meme coins are not listed on a top exchange but they are only listed on an unknown exchange. Many people are hesitant to use those kind of exchange therefore the meme coins will get delisted because they don't get any volume.
On the other hand, meme coins that are listed on the big exchange (like for example binance) might get a regular volume because there are investors that like to invest on any coins including meme coins that are in the big exchanges. They think it can pump even for a short time only. Of course we don't need to follow those kind of investors because they may be high skilled and willing to take big risks in a return for some quick gains.
Yeah, it is expected but thanks to OP for the warning, in case there are still people that didn't knew how risky it is to invest on those type of coins although there can be some exceptions for the coins like dogecoin and maybe shiba inu? As these meme coins are pretty strong enough to withstand a tough bear but still let's invest with caution with them.
Even if we say that some meme coins are strong, they cant still give you a promising return in the long run. They can only be good if you use them immediately like if you are playing a gambling because they are fast and cheap but after every sessions, you might need to convert them again in a more valuable coin.