Don't, unless it's for a BBQ or friendly partying.
[1] https://www.wired.com/story/brazil-hacker-bolsonaro-car-wash...
[2] https://www.reuters.com/article/us-iran-cyber-telegram-exclu...
[3] https://www.haaretz.com/israel-news/tech-news/.premium-exclu...
C'mon, it's not even E2E. It's as good as Facebook Messenger when it comes to security.