I guess if an art collector buys an "original" instead of a print there is a feeling that they actually "own" the painting - even though in terms of viewing a p

I guess if an art collector buys an "original" instead of a print there is a feeling that they actually "own" the painting - even though in terms of viewing a print is equivalent and possibly more durable than the original. How can you restrict duplication so that someone could "own" a virtual good? DRM seems a little bit silly for things like music or movies or images because "using" a DRM protected object requires removing the protection just enough to copy it (despite the efforts of hardware DRM) but perhaps virtual goods like a house in a virtual world could be sold in a form where a copy cannot be substituted for the original. Is this possible? One can imagine a virtual house that contains the cryptographic serial numbers of all of the virtual bricks used to build it. The virtual world then only has to enforce a conservation of virtual matter...