BITCOIN? 18 U.S.C. § 486 : US Code - Section 486:
 

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Uttering coins of gold, silver or other metal
Whoever, except as authorized by law, makes or utters or passes,
or attempts to utter or pass, any coins of gold or silver or other
metal, or alloys of metals, intended for use as current money,
whether in the resemblance of coins of the United States or of
foreign countries, or of original design, shall be fined under this
title (!1) or imprisoned not more than five years, or both.

How exactly are bitcoins made of metal or alloys?

If your American.

misleading sig in OP )

those coins are collectible items and proof of concept of transferring bitcoins offline without interaction with bitcoin network and blokchain, and are not intended for use as current money.

What? I just bought those for $100 each:Oh crap

hold on to them :)

yeh and we wearnt supposed to record tv shows with vhs tapes either.

Slightly different situation.