Steem Wallet Gone for Maintenance at Bittrex, what Happend?

From this morning, Steem wallet is in Maintenance mode at Bittrex exchange. Any one have any idea about why it happend? And when it will be fix?

At the same time, interesting thing is Steem price climbing from 28000 sat to 50000 sat. It is very huge jump in a single trading session.

I hope Steem continue it's mooning.