Something tells me inveterate coin collector Mark won't be eagerly seeking to add this one to his vault:

It's truly unique, created using two distinct struck pieces. First, the base is struck with gleaming buildings on a frosted background. Then the inset of the Twin Towers is magnificently engraved and fitted into the skyline on the face of the commemorative with jeweler precision, able to rise up into a breathtaking standing sculpture. The effect is dazzling - it is literally transformed into a standing sculpture of the Twin Towers!

Things like this have been bashed out by opportunistic entrepenuers throughout history*, no reason to think it'd stop now. However much we'd like it to.

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* Several famous ancient Greek temple statues are known to us only through the small votive representations sold to help support the temple. The originals are long since gone, but people simply tossed the tacky statuette their Auntie Blopherous bought them last year in the trash. Two thousand years later the same trash is used to make an Archeological post-grad's career. Think about that one the next time you pass a kiosk filled with tiny Eiffel Towers or Empire State Buildings!