Seems it just isn't "one trader"...It is a generalized term... https://www.bloomberg.com/gadfly/articles/2017-08-07/bitcoin-has-a-spoofy-problem
S/he's probably doing what Paul Rotter used to do to the DAX. Market is trading at "x." Plant an enormous bid of, let's call it "1000," at x-10, then feed in a bunch of offers at x+10, x+20, x+30, etc., and slowly get filled as the market trades away from the bid. Once the market stalls, or trader gets 1000 offers filled, he pulls the bid and watches the bottom drop out. Note that this isn't a risk free trade - you have to be BIG and have balls of steel and a good sense when you unwind quickly. I think this practice is forbidden on the futures exchanges now, but bitcoin exchanges are still the wild west. (I personally didn't see this happen, so please somebody correct me if I get the details wrong).
No matter how high they PIKE it, some asshole will insist its going higher. unlimited morons and said asshole will probably be right