With the price rising to 9,000 US dollar this time around. I personally that the price of bitcoin by December 31 or 25 2017 it will be worth 11,000 - 12,000 US dollars the increasing demand of bitcoin is increasing day by day due to the ruckus publicity that the social medias other news all over the world are giving to bitcoin.
You are estimating a low price see the market jump of previous 24 hours price will be more than you are assuming it will be clearly above 14000$ and maybe more than that because many regions are now taking serious interest into bitcoin because they realize the fact that accepting it is reality and it’s better to accept it now rather than in future when price are much higher than now and it is easy to afford now than future.