What’s a Casascius coin?
Mike Caldwell first introduced physical bitcoins for purchase in 2011. He coined the name “Casascius” from an acronym for “call a spade a spade.”
The bitcoin mint will resume sales of 'unfunded' physical bitcoins and offer limited sales of 'funded' coins in Utah.
Mailing bitcoin private keys on a coin-shaped metal disc could be considered money transmission in the US.
CoinDesk takes a closer look at the world of physical bitcoins in all price tiers and flavours.
Casascius has stopped minting its collectible coins, following FinCEN's claims it was an unregistered “money transmitter”.
The Casascius coin was shown to be vulnerable to physical attack at this year's Defcon conference.