Goverment Hacking Bitcoin
Seized items that are not of obvious benefit to the thief eventually get sold at public auction. If they fall into a process that doesn't understand the technology or there are auctioneer agreements then it will be a traditional auction. Value is not likely to be understated or undersold as this will be a very marketable item to advertise.

Stolen goods are also used to attempt interdiction. The government would use the coins in sting operations and in attempts to undermine confidence.