Well, I might be wrong but he was one of the most active on the internal market or his bot is. And he is doing a similar strategy like is with withdrawing steem and SD. You can check his steemd.com and see for yourself.
But on the other hand, he may be on synero hype train like I feel most of the whales are.
Sorry for disturbance.
RE: This biggest reason steem prices are falling: The Arbitrage Sabotage Steem-Dollar Teeter-Totter