I have watch some altcoins order books which I trade, It makes me scared and at times will have to spend 3 hrs monitoring the market. They will bring on a fake sell order for you to think the market is going to dump real bad, immediately you sell out of fear for the hope of buying high, boom that is it, the market pumps. Other times, they set fake buy orders in several prices and one will think, wow! is going to shoot up real well, but after a while when buy volumes are enough to take profit, they offload, and there you go, they just took the profit. I have learnt never to follow the whales, when I get suspicious I stay off the market holding my bitcoin till the market is settled. Manipulators are dangerous in this space. Although they are found everywhere.