The title of this thread made me laugh. Bitcoincash was just an attempt by greedy miners to control bitcoin, which totaly goes against the point of bitcoin. Once seqwit is locked in on the real bitcoin it will make bitcoin cash look useless, why would anyone mine a coin that is as difficult to mine as bitcoin but a fifth the reward? People already use bitcoin and like it, it will take a huge revolution to switch everyone over to another coin. It's like saying my walmart rewards card will replace visa.
Regardless of that,BCH curiously brought a positive effect to BTC that almost nobody expected,the price increased considerably perhaps because of the opposite effect that those who supported BCH from the beginning they expected that the peoples could change theirs BTC to BCH and seems that exactly the opposite happened,that is the situation that I think happened but it is still too early to corroborate that since not even a week has passed.