Not sure whether that is oxymoron or a paradox but it is for certain one of the two. One thing is clear "good pump n dump groups" do not exist and if somebody claims they have one be careful because they are going to pump

a coin right up and then try to dump on all the suckers. Not a positive thing you want to get involved nor do you want to even be the person who is dumping. Very shady business stay away if possible.