Will,for me as of now bitcoin cash would not replace bitcoin,even though the price value  now is dumping into $10 in the market,because all altcoins also affected of this dumping price value even though the bitcoin cash coin itself.Bitcoin is facing now in the first week of the month of 2018 a price value dump,but bitcoin continue to lead in all coins in terms of value and popularity even those bitcoin cash could not replace on its position to be leading in the cryptomarket.