I don't trust yobit even with 1 satoshi. They are by far the most stinky exchange on the market.
Poloniex and c-cex are better alternatives, although i do trade and btc38 and they got a lot of volume on altcoins.
I am hearing from a longer period that c-cex is a better exchange and with this condition yesterday I was going to sign up for the exchange. the site was working better and when i complete the sign up form and submit then the site gone down. I checked once more and the same issue occurred again so I then decided to stay away from it.