Bitcoin cash is not the future and it will not replace Bitcoin. Just think serious, do you really mean that some small rise of bitcoin cash in some specific situation is the sign that it's better than bitcoin. I don't think so, it's not that simple. BCH will never have such support and it could never be so accepted, so don't waist your time and money on it.
I think for now Bitcoin better than all other coins just because of its price is too high and it's more popular than the others. You can easily see that at the moment you need to wait too long to complete a transaction in Bitcoin but with other altcoins like ETH, LTC, XMR,....it's very quickly cause the mining difficulty of Bitcoin is too high for now so miners are leaving mining Bitcoin to start with another coin with lower mining difficulty and it make Bitcoin transaction take much longer to complete. So if Bitcoin Cash price keep increasing I think it might replace Bitcoin soon.
Bitcoin is digital currency system and bitcoin cash is cash compare to both , digital currency only a best in future because all online process using only a digital system it's all are systematic so compare to bitcoin cash , bitcoin is the best in future .