For those who have responded that yobit is not scam (@Mhedz and @BekantanSejagatTeamPenipu),  now my latest news is that after protesting on webpages, social networks, etc ... they have frozen my account and now I can not transfer my current balance of any currency.
They have stolen all my money because they do not respond to my tickets or to chat or emails or anything.

I would not call slow to not answer tickets three months ago, I call it scam directly.