December 18 - $7k+
December 19 - $10k+
December 20 - $25k+
December 25 - $55k+
December 30 - $100k+
But this might not turn out to be correct because there are lots of factor that can easily effect the price of bitcoin like even a small piece of fud from unknown source in china causing massive dump right now. However if everything works as expected than above figure can be realistic speculation.
The Chinees ban on exchanges is already confirmed. I think if this kind of bad news continues for another couple of months then I don't think this year BTC price can be around 5K. It may need time to go back to the 5K range.
Bitcoin prices can go very high only when most of the main stream businesses start accepting and most of the developed countries start regulating to use of bitcoins. So I don't know how long all these developments take.
Honestly the speculation mobnepal it is hard to believe to be happen.. maybe around $6k-$7k from december 17 to 30