At an initial glance, many observers conclude Bitcoin BTC has already won and Bitcoin Cash BCH cannot catch up to the brand recognition, liquidity, community size or other metrics. Or even if it was starting to catch up, that Bitcoin BTC would simply raise the block size.
A strong brand or economic size advantage is never insurmountable, nor perpetual. BetaMax, MySpace, Kodak and many other companies are known specifically for being brands with a huge market lead that were passed by competitors for a variety of reasons.
The true "winner(s) of cryptocurrency" will only be clear once every single person on the planet makes every single purchase using on-chain cryptocurrency, and fiat currency has been totally eliminated from the entire world. By that metric, the war is just barely beginning. People needing to ask "Isn't it over?" is in itself sufficient evidence that clearly it is not. This explains why cryptocurrencies are so tribal.
BTC fans may try to dismiss BCH with the phrase "the market has spoken". The market never stops speaking, otherwise it would be possible to provide the timestamp when it stopped and the final price ratio between BTC and BCH at that time. The haters' need to constantly make these claims is indicative they remain hyper aware of BCH and worried about its challenger status for the Bitcoin title, and simply raises curiosity in outsiders who can see the contradiction between claims that BCH is dead and its continued existence.
See also: Is Bitcoin Cash (BCH) the real Bitcoin?
See also: Should (or will) Bitcoin Cash rebrand?