Even if there is a fork, I don't see the weaker alt surviving till the end of the year.
So I guess, there will be just one Bitcoin at the end of the year. And ~17 million bitcoins.
yes that should be quite long enough to kill off the alt
It'll be somewhat related to people's principles. The BIP148 fanboys are mostly all talk/no walk, and I expect that to drop pretty low. Whether or not it'll still exist though is a different question.
Who knows, maybe there could be end up being three. The original, the BIP 148 coin and a third coin which implements some crap like SegWit + 2mb.