I still don't get it, why do people join those groups. Everyone with a common sense can see it's clearly a scam. If you want to create a price pump, you need to have a significant amount of the coin. Now, those groups contain mostly small investors, with a few k$ top. That means that large market cap coins are out of the question. That leaves the very small market cap coins, which usually also have a very small trading volume. that means that most of the price pump will come from the funds of the pumpers, and when the dump begins, there will be not nearly enough buyers out of the pumping group to buy at the pumped price.