this shows the real image of BTC.
Yobit, is very notorious in faking their volume and because of this they attract many investors in their platform, many exchanges are following this practice, it's actually an old practice and we don't know who among this exchanges are transparent in their volume.
They are the first exchange in my experience to see a massive volume inflation of exchange volume and the bad thing is they allow it to propagate to different coin project.
I just don't know today if they still allow such illicit practice on their exchange.