I can explain you. I shorted it a couple of times and 50% of this shots resulted in losing money. I was convinced that $100 is too much that $120 is heaven and $180 is insanity (that was a good shot). But then I realised. Never try to fight against market. Each of my long positions is profitable. Now I am 5k long at average of $149 and I am going to at least $159. It will come soon. Moreover I am much more calm being long than short.