Ed Snible reports that a Chinese local government official will throw ancient Chinese coins into the sea to help promote a yacht race. See http://digitalhn.blogspot.com/2010/03/chinese-civil-servant-to-throw-ancient.html
The publicity stunt also seeks to link modern China's seafaring prowess with that of the Ming Dynasty by gluing the ancient coins together with modern ones.
For more about China's great seafaring past, see http://culturalpropertyobserver.blogspot.com/2008/06/chinas-forgotten-fleet.html
In any event, if old Chinese coins are important enough to be restricted under the State Department Bureau of Educational and Cultural Affairs' MOU with China, should anyone really be throwing similar (though somewhat later) ones into the ocean?