Even though bitcoin is under attack I believe that it would stay strong, This is what is killing bitcoin and ethereum could replace bitcoin's market cap.  The uncertainty of bitcoin or bitcoin cash as the replacement has miners going from verifying bitcoins to bitcoin cash, and it is creating a spike in bitcoin cash's price.  I thought that bitcoin would be her to stay, which is more than likely, but it shouldn't have to worry about bitcoin cash taking over a majority of miners while bitcoin is waiting for transactions to clear.