I think that every user has to be sure that all the messages, material he sends daily, and all his personal data is in safe keeping, and no one hacker can get it. Many new messengers are appearing now, and all of them are competiting trying to increase the number of their features. At first, I looked at atronocom who has many features for investors and travellers. But then I found Elvn who also pay its users for activity. Hope, crypto solutions for messengers will become as popular as social networks