[jsmthrowaway]

You realize you're alleging that Apple is moderating its App Store based on conversations people are having within an app? Given the gravity of your claim, and the fact that there are cryptocurrency-related applications all over the App Store, you really need to think about whether your possibility is more likely. (It isn't.)

Facebook taking down cryptocurrency gambling ads is much different than Apple removing a general purpose instant messenger. You're finding a connection you want to find, I'm guessing based on your knowledge of PnD groups being on Telegram, that being your sole exposure to Telegram, and your opinion on cryptocurrency.

Apple is very conservative with adult content which I consider the far more likely reason, be that buggy image search, some kind of trending view that porn snuck into, that kind of thing.