Bitcoin Dips Below $11,000: Analysts Forecast 30% Drop to CME Futures Gap. I think bitcoin might suffers more decreases before the end of the year and making the 20,000$ year end price not realistic.
There is a drop, that's pretty evident, in fact, BTC dropped to below $10,000 today, and still trading at $9900 as of this writing, however I don't think this would affect the possibility for bitcoin to reach $20,000 before the end of this year.
There's still a lot of time, BTC can pump 100% in a week, and the fact that BTC has stayed $10K as it's average price, there's no doubt that 100% possibility will help BTC to achieved it's new ATH.
Just wait for the big bull run, and let the FOMO take charge of everything.