I don't understand why I should switch from the "Devil" aka Whatsapp to the "Beelzebub" aka Telegram. Both systems have been and are criticised, Telegram for example for the obscure Encryption, centralized non open Servers and strong ties to russian VK. If I were to switch it must be a really good system like Textsecure as it is a lot of effort to bring my contacts to switch as well. I don't wanna do that more than one time.