The problem in here is that no one has enough stomach to see their balance going down, that is because they bought a few days ago /weeks, and they are afraid of losing a few bucks.
That's not why or what happened. Let me explain.
They are the only ones who doesn't care a fuck about bitcoin cash, they only want money, they got those bitcoins cash probably for free and they want to push the price to the top, that is money raised from the air, why wouldn't they want to see each one of their bcash worth more than $10000? You would probably do the same.
BCash is very very thinly traded, and traded on very few exchanges. Bithumb being the biggest exchange by volume. That's because the float there is really thin and tightly controlled by the Bitmain/Ver/Wu whale cartel.
This.. They will have the control forever, they are mass adopters, they have hashpower, they have volume, they have "supporters" they have everything that they need to manipulate any market.
So what happened on GDAX is that whale traders knew that buy rushing in and buying up all available BCash , they could gain control of the extremely thin, meager float that exists on GDAX. And with control of the float