In my opinion, the price of bitcoin seems difficult to reach $100k in December because after experiencing a decline in the price of the last few weeks, the price of bitcoin is still not showing a significant increase. Therefore, maybe in December the price of bitcoin will only reach $70k especially now that it has entered the end of 2021.
Currently, the value of every bitcoin is at 51.6k USD and we are now experiencing a price correction and hopefully it will go higher this month before this year will end. Yea, you're right $70k is possible but 100k USD? That may sound quite impossible for this year, but in the year 2022, it's very possible for bitcoin to reach that milestone.