Nobody really knows who(or what) this whale is. I suspect it's something to do with price manipulation to keep BTC/BCH from flipping. Blockstream's $trillion banking backers.
I would imagine the Blockstream insistance of Hodling plays into Whales favour by limiting volume and thus forcing price down at will.
Exactly, it keeps the order books nice and thin so they can slip the price whichever way they want and create even more panic.
