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.
How can we be sure about that? Coins were moved out of Bruno's addresses after his mortuary was posted and not long after that someone posts from his main account.
If another person that compromised the accounts has access to so much, then it's likely a full compromise and other accounts aren't to be trusted also.
I personally secured that account with a strong password so I'm very sure.