Casascius Coin

Casascius Coins are physical representations of Bitcoin created by Mike Caldwell, also known by his pseudonym Casascius. Introduced in 2011, these coins contain a private key hidden under a tamper-evident holographic sticker, allowing the owner to access the Bitcoin associated with the coin. Casascius Coins were available in various denominations, with the private key representing a specific amount of Bitcoin. Once the holographic sticker is removed to access the private key, the coin no longer holds any Bitcoin value. Casascius Coins became popular as collector’s items, and some of the remaining unredeemed coins have become highly valuable due to their scarcity and historical significance. However, Caldwell ceased producing loaded Casascius Coins in 2013 due to regulatory pressure from the U.S. government.