Jihan had plenty of BTC and BTC forks in his wallets, but I'm sure they're running low on fiat to pay for their massive operations and upcoming legal issues. I expect they will liquidate some of their holdings to have some working capital.
And in true Bitmain fashion, I fully expect them to place some shorts, dump on the market at some off time and cause a panic sell off, and rebuy on the sell-off after having closed out their shorts.
Remember kids, even when Bitmain is losing they're winning. For those of you who don't understand - they're going to manipulate the prices some more (and not out of greed like they usually do but out of necessity this time lol).
There would be no tears shed on my end (maybe tears of joy) if the likes of Bitmain were seriously hurt during this downtrend, but unfortunately I think you are correct. They are so large that even during bad times they can manipulate the market enough to benefit themselves.
Also, as another poster pointed out, they are probably only publicizing this for tax reasons and not really financially hurting.