There is nothing like an inner trading circle in public domain. There are just rumours and some money looting idiots. What generally happens with P& D group is they will have two groups one for the free public and second for the private public second one obviously being paid. So they build up their free telegram group usually with help of couple of other groups then all they do is first buy the coin themselves then send the coin in the private group which increase the price and then send the same news in public group. This generally gives the private group users 3-4% of return and that too not in every coin many a times you might buy a coin and it's price would never increase. Only person in profit is the one on the top of the chain. So there is nothing like inner circle. If there is you surely won't find about it in a post of Bitcointalk or on Telegram.