As we all know that Bitcoin is very strong as I heard bittrex is offering Bcc as well to those who is having bitcoin on bittrex platform, I think Bcc will not be as much popular as Btc I don't think so it will effect Btc but for shorter time we can see little drop in Btc but Bcc will not be able to damage Btc. Sooner or later Bcc will be dump as we all trust on Btc none other coin can overtake or replace Btc in near future. Ultimately Btc will keep moving to upside.