I've tried YoBit once, and I haven't traded again ever since.
Are all trading sites like that? They're just pumping and dumping the coins.
They are all fake except the old ones.
Not all are like that. The small exchanges like yobit, c-cex and cryptopia are not to be trusted.
BTC though not famous for their pumps and dumps is also an exchange I don't trust. They don't accept SEPA f.e., but they do accept 20 unknown online cards. What's that?