I strongly recommend everyone, who still can, to withdraw all of his coins from Bittrex. It looks more and more like an exit scam. They are still accepting deposits but continue to silently downgrade accounts to "New" every day and drop their withdrawal limit to 0.

I wouldn't be surprised if Bittrex soon announces that they have been hacked and that the coins have been stolen and then close the exchange while keeping all the coins for themselves.