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.