BCH will not replace BTC. The moment BCH is less profitable to mine than BTC the miners will switch back to BTC. Mine will.
As for the debate on Bitcoin as a payment system, Sorry but Dash and Monero will beat out bitcoin and it's spawn (including litecoin). Dash has a better governance and obfuscation system than Bitcoin and it's clones. Monero has ultimate privacy and a better mining system then the others.
This BCH pump is clearly just an attack on Bitcoin. The mass of backlogged transactions in the Bitcoin network are mostly spam and do not prove anything about bitcoin scaling problems, rather it shows a directed effort to attack the network. And as many are fond of pointing out that Bitcoin has no CEO to sue, there are the known developers, who like screaming "FIRE" in a crowded theater, are responsible, and CAN be held accountable.