Both the coins are potential coins. But bitcoin is the No.1 cryptocurrency and it will never let go its position.
A lot of people seem to think BCH will win because BTC fails, but that's not how it will go down. It will be the other way around.
BCH will succeed because it's lesser focused on actual adoption, while BTC despises adoption (one-day people will look back and think of BTC as the hubris that brought down many once-powerful empires). And then BTC will fall as a result. The high fees and things like that alone will never kill BTC.
Ordinary speculative investors probably can't see it yet but there is a LOT happening behind the scenes in BCH, including developer ecosystem and merchant adoption. These are what will make BCH succeed.
One can
convert bitcoin cash to bitcoin to get 0.035 BTC at leading exchanges like Binance, Coinswitch, Changelly etc, which is a good range to convert.