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Physical coins are used to enable people to hand quantities of a cryptographic currency to each other. They generally contain an outside label indicating their value and a tamper-evident seal containing inside a claim code or key.

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How does the Casascius project make money?

If you're asking about the Casascius Physical Bitcoins business operated by Mike Caldwell, the simple answer: it doesn't, as it has been defunct since 2013. See the bitcoin wiki page. The coins he pro …
Pieter Wuille's user avatar