I'm pretty sure it is temp pump for BCH. BTC is the main cryptocurrency on the market and still will be. i Have been using BTC since it was 400. Many crypto tried to compete with BTC in the past but no luck.
BCH has temp pump and soon this pump ends and some who invested and believed in BCH might loose
We all agree that it is a kind of a pump, but the main concern here is that the bitcoin cash is stealing network power from bitcoin mainet, which means that we are going to have less frequently blocks for the next few weeks, until the difficulty adjustment.
The fact that the legacy chain bitcoin is going to rule at the long run doesn't change the fact that the rise of the bitcoin cash damages the eco system of bitcoin.
The bitcoin cash rises in price--->It becomes more profitable to mine bitcoin cash------>Bitcoin hash rate becomes lower---->>Less frequency blocks, which is a very bad thing while bitcoin stands in mainstream.
It was a well timed thing to be sure, but really isn't sustainable at all. BTC will simply correct a few weeks/months later and things will be on their normal path again.