The point are bitcoin and bitcoin cash can be traded, because if seem chart, while the bitcoin prices up ,the bitcoin cash prices go down,and otherwise.though the profit is small,i think trading BCH its profitable for fast trader. but still be careful with the trap, better small profit but many times than to want big profits at risk. High profit high risk.
You can trade both, you can take the advantage of both, you can take profits from both, BUT, you cannot hold BCH to make your live under a gurantee of wealth. You need to move your funds into BTC, instead of BCH.