According to much known persons in the cryptocurrencies field such as John McAfee, and to it's linear charts that are going all the way up all the day every day , bitcoin will even break a much higher record by the end of 2020 .
But as we are approaching the end of this year , i don't think it has enough time to double in value in such a short period ( less than 1 month ) . It may be able to do it tho since bitcoin didn't cease to amaze it's users and holders across these historic 10 months , it gained more than 4k dollar just in the past month and made over 750% of growth in just 10 months , so i won't be surprised at all if it does reach 20k by the end of 2017 ! .