I predict $1700 by December 2017 it mainly depends on what happens in China.
Yesterday chinese goverment advised people not to think carefully before gambling on crypto currencies ... hence the drop ... seems like people listen to government advice there. But my guess is they will think about it.. realise bitcoin is gold2.0 and come storming back ..
or another guess is that Stuart made me buy 2 bitcoins at 1000usd each, and that triggered the price drop (according to him)