I've no idea about private groups. But, There is nothing special in the trading signals group which are so-called premium /VIP, their only aim is to collect money from people.
That's the main reason why there are private groups in Telegram that offers such trading signals. There are lots honestly.
Yes, they are giving and providing signals but obviously, only a few might be correct. Aside from that, those signals don't have an involved analysis.
Free money for these owners. If they predicted it right, it will result in their subscribers to believed in them. That's the reason why they can lure other people to subscribe and pay money for that kind of service.
Its a simple concept and those group owners will definitely just give their casual speculation and telling or attaching it that those are good signals or best ones and when it did end up profitable
then this is where they do ask out with some subscription fees which is really just their main intent since from the start which its never been recommendable that you should really be making yourself
believe that it was really that easy to predict market movement or someone who do make out some claims and give out guarantees on making profits and asking out for some sub fees.
They are all just bogus unless if its free then it would really be ending up on your own discretion on whatever decisions you would be making.