Mike Caldwell is a software engineer known for minting physical Bitcoin coins in 2011, known as “Casascius coins.” The coins are made of brass with each containing a unique Bitcoin address. The coins are no longer produced after Caldwell received a cease and desist order from the US Treasury in 2013. Because of this, Casascius coins are now highly collectible among cryptocurrency enthusiasts.
Mike Caldwell in the News
Interviews with Mike Caldwell
- 2019-07-18: Casascius Coin Creator Mike Caldwell on making Bitcoin meaningful for the masses
Mike Caldwell FAQ
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How many Casascius coins were actually minted?
Although the exact number is not known, it is estimated around 28,000 coins were produced between 2011 and 2013.