Reread the entire thread and opened all the links. The information that you post now was not visible in any of the previous posts.
I opened the Twitter thread; nothing to see. I have no Twitter account, maybe that makes a difference. My settings also block the tweets. So I have to open it in a new screen. And probably I still don't see everything. To me all this social media is garbage. Not interested in it.
I agree, there was a comment from someone in govt about tumbling which seemed to reinforce this. No secrets in the blockchain, by definition every transaction is public. It's been demonstrated that even with tumbling you can track folks down rather trivially. There was no supercomputer hacking of the blockchain going on here, just a high tech version of the same kind of detective work used against money laundering since Al Capone days. As always it's easiest to catch thieves when they try to move or use the money. BTC in cold storage is perfectly secure....and perfectly worthless.