Well, another reason is they want to influence the market by speculating all sorts of bullshit to cause panoc on the weak hearted bitcoiners. These people then will sell and sell until they lose all of their bitcoins and cry in the end. Another reason is they might be hatin on bitcoins coz they lost a lot and got jealous with others who gained a lot profit so they spit out so much shit so that they can make others lose a lot also like them. And believe it or not, this makes them happy.