Good decision by him then. It won't have no effect, because even if the news is good sometimes the price goes down and vice versa. But it should have a minor effect as it really does not have anything to do with the fundamentals of Bitcoin.
For now it won't have any effect maybe in the future it would stop a lot of traders from worrying after this news. If the article shared by figment was true then the trustee probably sold it together with the private keys.
It's a good thing they halt. I bet they too don't want to lose money because of the current price of bitcoin. In another perspective, I guess they should just dump all they want to now, not when the price will pump, they will start doing their thing. And moreover, I never wanted to believe that they might contribute to the recent price decrease but with this news, I guess I have been wrong.
At first, you said it's a good thing then now you want them to continue what they've started. Either way price could still go down because the creditors have the choice to dump as soon as they get their Bitcoin back.