It is matter of time when a huge hack will happen to one of the major exchanges! So people will get scared again. This can be a reason for price going down again. We will see..
BR
What do you mean Hack? I don't think gox was hacked? It's the owners fault. I don't know the exact reason but people were scared at the recent time because of huge price fall but now when It went up like $30+ people started buying more bitcoins only because of price rise with intention that They'll make even more money because It started sky rocketing up and It did, now $200 Up. So It's like chain reaction price starts going up and more people buys bitcoins and the price keeps going up.