Being an insider of a PnD group means you will get the signal for selling the coins a few seconds earlier than the other members. My advice would be to avoid it at any cost. It is too good to be true. Generally outside members of the group are used in the pump process as bait. And once the price of the coin reaches a certain peak and creators of the group and the insider members mass sell the coin and inform the rest of the members a few seconds later. By then you will have missed the train and doomed with some Shitcoin which was already dead.

https://bitfalls.com/2018/01/12/anatomy-pump-dump-group/

Please read the info from the above link to get an insight on how these scams work.