Whatever is happening with BCash, it appears to be a coordinated effort. Its likely something Roger Ver and friends have been planning for a long time. The most likely explanation is BCash will follow in the footsteps of ethereum. There will be a big spike. Followed by dump. Roger Ver and friends will ride away with the lion's share of profits. Then BCash will sit idle and not move much as eth has for the last few months. Ethereum may have already showed the blueprint for where BCash's future lies.
Most big price movements appear to be coordinated. With bitcoin it was a co-operative effort between Jamie Dimon, china banning exchanges and a host of media and academic personalities coordinating to label btc a bubble.
With bitcoin cash, it was a coordinated effort between bcash's network upgrade being out soon, Roger Ver attacking bitcoin and claiming bcash is the real bitcoin, sock puppets spreading pro bcash propaganda (like this:
https://bitcointalksearch.org/topic/weird-theory-i-heard-of-2383794 ) and whatever else. Roger Ver and friends likely bought bcash to prop the price up and create a spike, intending to profit off it later from the shift of momentum?
If segwit2x was
plan A. Bitcoincash pump and dump could be
plan B. Notice how quickly after segwit2x was cancelled this coordinated effort @ bcash pump occurred.
This is an interesting topic. Unfortunately I cant say I've been following events close enough to know with good accuracy what the implications or exposition to this is.