When you said meme coins, I think you have to specify it for clarity sake. There millions of meme coins trading on different places and many are just waiting to pull liquidity from people before they dump coins on them and take money and run away. At least a day, there must be a scam liquidity exit from meme coins. The meme coins listed on the exchanges are not exempted, they are manipulated by whales to make money and dump the next day.
Investing in meme coin is like gambling with your money, because their is a higher probability of coming from it in a massive loss, and since these whales can easily manipulating it, it becomes even more unpredictable, because you can buy today, and it start crashing hard from that moment you bought it, so you will want to hold unto it further, so that you can recover your losses, but in the process of holding further, you lose even more. Out of a total of 100 meme coin, it's only like 5 out of it that may pump hard, while the rest may not even pump, so it's best to stay off such risk.
I don't do not know how some people survive doing it with meme coins because there is no a guarantee guide about it but I will go for good altcoins and make profits instead. Meme coins are terrible buy, but some altcoins are profitable even by looking at the historical charts.
The only difference between a meme coin and an alt coin is just only a matter of which of them is less shitty, because to the best of my knowledge, they are both full of shit, so gambling on alt coin thinking that they are much better than meme coin is wrong, they are all full of shitty as far as am concerned.