BCH, BSV and BTC will probably undergo a fight out of which only 1 will remain the king. I only personally support the latter one so I'm thinking it's going to be the one to win. I'm expecting BSV to fall to shit and BCH will just maybe be able to survive and possibly have a little increase post this halving. But until when?
If you looked back when the original BTC forked into BTC & BCH, you would know right now why precisely were people investing the latter: hoping for a move similar to BTC to follow up. Same thing happened when BSV popped up, but there is one big difference: BSV's creator is the scummiest person alive. Bitcoin Cash would have won if it had the majority of people moving from BTC to it, but that wasn't the case. I have personally wanted to be an investor of both (actually all 3, because the stupid and idiotic me was
almost convinced a few months ago that CSW would truly prove he's Satoshi) but I gave up on al but BTC..
So I'd expect only a little, non-significant (compred to BTC's) price change of BCH & BSV but BTC will still be the one to win when it comes to price increases post-halving. I don't know, consider me biased but this is my personal perspective. We can't have 3 different coins having their price affected the same way every time. One day, at least one of them will fall. And one day, people who've invested in BCH or BSV hoping to become rich overnight after a while will get sick of the bullshit of the team behind them.
Excuse the number of times I've written the abbreviation of these 3 coins in my reply.