This is all going to be very bad for bitcoin
No-one who wants to hide their wealth is going to give the US Marshals service a goverment issued photo ID and a $200,000 wired deposit. It was announced at quite short notice so pretty much the only people who could apply will be companies with $200,000 sitting in a US bank account.
That narrows the field to companies which are reputable in the US and don't worry about what message buying bitcoin sends and who have ~$1m to spend on a lot.
Which is a small number of bidders. The vast majority who will have the profile of wanting to buy cheap from the auction and then see a return by selling, at least a substantial part, through exchanges. Of course they won't dump the coins but will trickle out at a sell value.
Then the US marshalls will announce the sale of the rest of the coins they have something like 144,000 of them. That's 10% of the coins in circulation.