If they can't prove the coins are stolen, they should belong to the people who had them.
Of course, the government gonna do what the government gonna do. All money and property is their's, they just let us use things for a while.
Yep - now they're making noises about creating "The King's Money":
Citi Economist Says It Might Be Time to Abolish Cash [Link Only]
http://www.freerepublic.com/focus/f-news/3279962/posts