From my beginning I am using Yobit without any issue.
Though it doesn't requires me to withdraw other coins from Yobit. I do only withdraw bitcoin.
I suggest that you withdraw your money, and stay away from it.
You are scaring me Lauda.. Now I am in hyper tension about it..

Though it won't be easy for me to leave yobit instantly. Because of the altcoins I have there.
I will keep your suggestion in mind and follow.. Thank you!