Manipulating the market on Bitfinex and Bithumb is not sustainable. Roger Ver also moved tens of thousands of BTC to Bitfinex to help pump the price. I don't know how much the guy has stashed away, but he won't be able to dump his bitcoins forever. Dip buyers will scoop them all up.
Having said that, I don't think this is over. I think they will let the market dump like they did in August/September, and then they will repeat the same move: 1) spam the BTC blockchain, 2) put out a bunch of fake news articles and press releases about Bcash being the real Bitcoin, 3) pump the price on thin order books -- probably on a weekend like they did here.
This would never fly in regulated markets....
So actually, this game can be predicted, a segwit cancellation is a good moment to make this manipulation shows, this is a well-planned.
Roger Ver and some of his colleagues seem have plenty of BTC to do this, last week the btc price was down around $ 1,000.
Are you sure they will repeat the same move in this month or later?