Old traders already know that there's a lot of manipulation going on in every exchange, some of them are inflating some coins, to make it attractive to investors and traders, if you want to know how they do it, better check Yobit, they always do it almost daily, even shit coins get a pump.
We already used to see exchanges like this and its really shit if you buy coins easily without realizing a fake volume. Traders are just riding the trend nowadays and they know well how the exchanges works. Newbies are usually the victim, FOMO are still in this market. I believe almost a 100% of price manipulation on Yobit, don't trust that exchange.