The volume today is 22 billion. 2 billion in downwards pressure would lower the price but it’s really not a huge deal.

Most deals like that are not done on the open market though.

Governments aren't fools, they generally don't just yolo a market sell order when liquidating seized financial instruments.

If it’s sold at an auction or anything like that I don’t know how much arbitrage you can really get. Especially since there might be fees or taxes

it is a lot but it would not be sold at once. probably sold in secondary/OTC market

They may be sold to a financial institution at some discount on face value, which would then do the best they can with them.