Even if you buy ZEC at $10 you might still have a loss, because at this rate ZEC might just dump down to $0.20 by Feb next year.
I'm not sure any trader made profit from ZEC

Well, maybe day traders

I suggest you to try read about the economic 101 and you will be getting the right answer about how the ZEC still down anytime.
http://www.investopedia.com/university/economics/economics3.asp
The trader still has chance for make a profit but just a little.