Interesting stuff! Personally, I think Bitcoin Cash will wear off. The limited block size was a real issue and unless Bitcoin Cash has its own solution, it is just a bad (or less good) version of Bitcoin. And as you say, the majority stays with Bitcoin. The fact that the price jumped to $700+ is pure speculation, if you ask me. People were hoping Bitcoin Cash would jump to Bitcoin levels, but over the long-run I expect them to realize this won't be the case.