BCH will be very difficult to replace BTC's position because BTC is supported by many corporations and large countries in the world. CoinFlip has announced that their ATMs will only support BTC. If the BCH wishes to succeed in replacing the BTC, they will need to gain support from the community and need a large number of corporations to support them.
Price is not the only basis so we can say that one coin will defeat other coin. But we must take a big consideration for its acceptance in the community, if this coin will stay at that trend for a long time.
We can say BCH now is trending and mostly talk by many traders and investors just because of having a price surprise in the market. But look out the price right now is going down. BCH is no different from other altcoin, and there is no chance of winning against bitcoin.