Because you aren't buying enough bitcoins! How many did you buy yesterday? None? Come on man. The reason we're stuck at the $600 range is 100% because of you. That's my theory anyways.
Haha That's the super answer! But it really has sense. Semms like bitcoin selling-buying going not so activly this days and weeks, that's the reason bitcoin's price frozen on the same point. I also wish to it start to rise, but we all need to wait for now.