The wallet is locked on bittrex, and yet working on hitbit without a problem, so hypothetically it wasn't so necessary to disable it in the first place!
Exchanges make their own decisions about what to do. If hitbtc wants to use an unstable wallet, no one can stop them.
And the Hash Rate rise is probably caused by some sort of BotNet, how did they deal with it at MONERO?
Monero has never done anything to "deal with" people who want to mine it. There is no KYC process for miners. Do you understand that?
Claiming that there is "too much" hash rate on a PoW coin is rather absurd when more hash rate is what makes the coin more secure. Don't be a cry baby if the hash rate (aka difficulty) is too high for
you to mine with a high profit margin. Figure out how to mine more efficiently or go mine something else.
And someone expressed suspicion to 51% attack, is it a possibility?
It is always a "possibility" but it was also not consistent with the observed data.
Does anybody spoke with Smooth lately, is he still around?
Yes and yes.