Either chainanalysis got really strong now, or the hacker made some serious mistakes when handling the stolen coins, and it's probably the latter, because otherwise we'd see a lot of stolen coins suddenly being identified. This kinda shows us that no one is immune from mistakes, even people who are l33t enough to steal billions of dollars worth of coins.
The American intelligence services noted that this is the largest amount for the entire existence of cryptocurrencies that they have confiscated. And now the most interesting thing begins - who exactly will become the owner of all this fabulous wealth ??
Someone who will buy them from the auction, obviously. I'm sure there won't be a shortage of people willing to buy the coins, especially if they will be sold at a slightly below market price.