Lol. The already answered your own questions. Its a Pump-And-Dump group and I'm sure that their main goal is to pump some coins and then exit early while others will lose. So that's very fraudulent to me so I don't think you can call them trusted or legit.

And I also believed that there's no such thing as a legit and great reputation P&D group out there. They are all for a quick money and newbies joining will be eaten alive by more experience and premium members.