Telegram is adopted widely by the “crypto community”. But Monero should not be apart of this, as it’s a centralized platform doing zero metadata protection and only encrypted on mobile. Here’s an excellent video you can send your friends who request you to message them on there: https://video.simplifiedprivacy.com/why-telegram-sucks/
Best place for XMR trading is AgoraDesk/LocalMonero
Right. But Agoradesk/LocalMonero uses Telegram for their customer support because they and their customers are ignorant of the concepts in this video