The age old question since the rapid growth of altcoins that started all those years ago.
The best answer I can come up with is, "maybe". But I will tell you something though, the cryptocurrency that might replace Bitcoin will not be Bitcoin Cash.
Why are pretty sure not altcoin that replace bitcoin not bitcoin cash? I dont like bitcoin cash but as the recent price is high, very possible altcoin to change is bitcoin cash.
Because everyone in the community who has half a brain knows that Bitcoin Cash is a miner's coin, and Roger Ver's own propaganda network to topple Core as Bitcoin's stewards. I do not really know what Roger Ver's history is with Core and what caused his dislike on them but the guy never stops. Very irritating.