It's hard to say at this point. We can use some simple math with the rule of 70 to figure out its annual growth rate: Dt= doubling time. Dt=2 years. 70/2=35% annual growth rate. When we see the slope of the chart start to plateau annual growth rate should decrease significantly. When this happens, I expect the market will overreact and a sell off will ensue and eventually stabilize. It's hard to pin point a top with a growth rate of 35% per year. If I had to make any sort of guess, I'd imagine 800 is in the works at some point during 2013.
well done infinite_margin ! the growth was exceptional, Steve Jobs' vision incredible, but as you said, exponential growth will never last forever, even though a company can be very profitable for a long time (as in Microsoft)... but this "flagstick" price action will soon come to an end. Shorting might be too aggressive (perhaps for a quick buck), but longs should really take (at least largely) profit. totally agree to your call !