i don't want to speculating now, as it is too soon, but that is what people saying.
There are so many altcoins with various advantages and specific purpose, and we can assume the most famous cryptocurrecy are bitcoin and ethereum even though there are some altcoins that has higher price compare to eth. Bitcoin cash just launched and seems could get many attention from bitcoiners and will take the second place of highest price in the market. In my opinion, there is no way for any coins could compete with bitcoin, because the most important thing is usability, which bitcoin has achieved so far and being accepted by many people, business and exchanges.