Because people are selling alts in loss and buying BTC thinking they will get BCC after split.
But is stupid move in my opinion.
After Segwit, you will never see alts at these prices.
Don't be stupid, don't sell alts bcs BCC will be soldout very fast and it will worth $10-$100 and that is nothing ( 2-4%)profit but from alts you can make 100% easily in 7-15 days. Choice is your but think twice before selling your alts!
