Nostr, built on open protocols, will exist forever as long as there is one client and one relay. It can continue to survive. You can always log in, and no one can prohibit it. #Nostr will win!
https://image.nostr.build/4603c01c8ad5880d38d865f920b3f9eb8d379ab79e4f01b3a5a48550f93674a6.jpg