The price of BTC 1yr ago was around $200 and today its $660. The anticipation that BTC price will double is already accounted in current price i.e. is 2*$200=$400. The extra $260 is based on new investment pouring in BTC. If these investor take profit and exit price will come down to $400 range (which I believe is unlikely) . So I think the price of BTC will remain in $600-$700 range.