Physical Bitcoin Cold Storage Spy Coin

Year 2014
Denom. 1 BTC
Type UF
Mintage 100
Material Gold Pl. Alloy
Diameter 39 mm
Thickness 3 mm
Weight 20 g
Country USA



The ‘Physical Bitcoin Cold Storage Spy Coin’ is unlike
any other physical crypto-coin. It is designed to hide
a private key, but it has no sticker or hologram nor
engraved key. Instead, it actually opens up in a way that
a piece of paper or even SD memory card can be put
inside the coin thus hidden in plain sight! The ‘spy coin’
comes from the historical fact that similar hollow coins
were used during the Cold War to hide secret messages
or even conceal drugs which an agent could use to end
their life upon capture. The name ‘Cold Coin’ refers to
‘cold storage’, which is the state of crypto-currency being
stored in such a way that they are ‘offline’ and impervious
to hacks or accidental computer damage. The front face
of the coin consists of a Bitcoin ‘B’ which is covered in
gears, whereas the backside displays several gears that
remind one of a mechanical watch. All 100 coins are
The coin’s categorization as ‘unfunded’ is valid since the
design is intended to ‘secure’ a private key, though the
lack of any security sticker means that the integrity of
the stored private key (i.e., the fact that it has not been
opened since being sealed) cannot be guaranteed.