Are celebrities promoting stuff a good chance for profit?

I've never invested in crypto actually, so I honestly don't know;

but...

We all know that celebrities like promoting stuff. Like random new coins.

This usually leads to a huge pump, then a huge dump, right? For example, I heard some stuff about coins with prices that went up 3000 times after being promoted by a celebrity.

If we just hear about a coin being promoted by a celebrity, wouldn't it be easy profit to just buy a lot of the coin, then sell after a few times profit and watch as the dump happens after you sell everything with lots of profit? If the coin has already soared, probably too late, but if it hasn't, then wouldn't it just be simple to buy, sell at the peak, then profit?

I've always wanted to ask this, sorry if this is a stupid question.