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.
So which coin are you thinking, Maybe Dash??
No, not a scamcoin with a premine. It will be something better than Bitcoin in scaling, fungibility and maybe also energy efficiency. But definitely not Dash, no way.