Let me quote my post from November :
Anyway, yes I agree that in first quarter of 2018 the price will probably go down, to 3-4000, but simply because of the people who invested heavily in 2017, in hope of high return. And they tent to get nervous and drop at first sign of price declining. I see lots of that kind of guys lately.
So my prediction, 3000 - 4000 in January and February, and 12 000 - 18 000 end of 2018.
There are lots of people driven by pure greed, who don't support, or even don't understand the idea of bitcoin and cryptocurrency. They can drive the price down to 3 000, or at least to 5 000.
I am prepared to start buying when it reaches 5 000, the more it goes, the more I will buy.