# 25 BTC Casascius coin
## DESCRIPTION
A Casascius coin is a bitcoin "cold storage" wallet made of metal with a holographic security sticker attached. Underneath this sticker lies a piece of paper containing a private key which can be used to acquire the bitcoins contained within the coin's address. The hologram will be destroyed upon redemption. The unblemished hologram on this coin attests to the fact that the coin has not been redeemed and is fully funded.
## HISTORY
Mike Caldwell, the creator and distributor of these coins, was shut down by Fincen in 2013. A plethora of similar coins (Lealana, Denarium, Spartan Titan...) plopped up over the years, but none of them were able to capture ...