Checking the recent activities, the account has either been recovered by the real owner or hacked. Until there is any suspicious activity, all eyes will just be on the watch to see how and what's next with the account, if the real owner will make a post, or if it has changed hands.
I think Cyrus and team very well know that it's a high profile account. Do you think they would just let it slip into the hand of hackers just like that? Not bitcoin signed message?
I personally don't think so.