Not if only one of the accounts have been hacked, and not the others. There is no evidence that Gleb Gamow or YuTü.Co.in are compromised.
Gleb Gamow account has not been compromised. Whether it's a hacker or Bruno himself rising from the dead - they won't have access to that account.
What would you do if someone came on and said they were Bruno, could prove word-for-word every conversation / provide every BTC TX signed messages from every BTC wallet address you could think of etc etc etc and asked you to hand back ownership of the Gleb Gamow account?