I think that even BCH should be counted out in this. I don't think it's fast enough or cheap enough.
Coinbase is going to continue to add more crypto/fist exchanges I believe. As this happens, we have less dependencies on BTC being the go to coin for exchange.
Currently, I think ethereum may take it's place, since Bittrex and other exchanges have ETH/Whatever.
I think as a collective, we need to move away from BTC being the main exchange coin.... We are placing part of our future on an old, out of date, expensive, non-flexible protocol. And while the failure for BTC to change may be partially the fault of the BTC community being toxic, I think it is inevitable that BTC will fail.
Facebook wasn't the first. Myspace was before it. Something was probably before Myspace .... Than you had forums....
The first ideas aren't always the ones to stick, it's the people that come after with even better ideas and innovations.
So, while I am not super clear on BCH and it's advantages, I think it still wouldn't be good enough for mass adoption as there are other choices that have no tx fees, and faster tx times.
If ethereum wasn't constantly bottle necked, I'd put more faith in it.
IRC FTW!