At that point I honestly believe that absolutely no one is using Bitcoin Cash a legit payment method. Everyone is just speculating that the price will increase or decrease and based on that everyone makes their buy/sell decisions. Bitcoin Cash is just a rip-off and will always, even if it gets traction and people start using it everyday it will still be a BTC copy and no one will eventually care about it. Yes it does have a more efficient block-size but that's nearly not enough for people to start using it. Unless BTC runs into trouble and everyone can't use the network to make transactions, BTC Cash will be useless. BTC needs to fail in order for BTC Cash to profit so the only reason you should hold BTC Cash is to hedge against BTC.