It's not easy to say.
Honestly, I am a victim of a pump and dump many years ago during the ICO days. I always tell myself to never repeat the same mistake that I made before, and so it becomes really difficult when picking a memecoin that I want to buy. Then, I sell them as fast as I can, especially when I see a profit. That's what I did with Shiba Inu. I saw that it's the kind of thing, a pump and dump. Bought it at its very low price and sold it when I doubled my investment.
That's why I say that you cannot tell if a memecoin is a pump and dump. You will need to monitor them to get in or out if you want to.
Something like in between no rest of mind and sometime when you're out with all your capital and leave some moodbag the peace that comes with it! for me i have a target once it's meet I'm selling no matter the promise am seeing! i did with this csky maybe prolly because i wanted to participate in the listing carnival by the cex to share from the 100K usdt prize pool