But it’s true. He takes bitcoins — the world’s most popular digital currency — and then he mints them here in the physical world. If you added up all the bitcoins Caldwell has minted on behalf of his customers, they would be worth about $82 million.

Basically, these physical bitcoins are novelty items. But by moving the digital currency into the physical realm, he also prevents hackers from stealing the stuff via an online attack. Or at least he did. His run as the premiere bitcoin minter may be at an end. Caldwell has been put on notice by the feds.