When Bitcoin Was Physical: The Rise and Return of Casascius Coins

Back in 2011–2013, physical bitcoins were actually a thing. They were known as Casascius Coins — metal tokens with a hologram on the back hiding a private key printed on paper. Peel the hologram, and the BTC could be moved to a regular blockchain address.

What makes this story even wilder is how many people never touched them for years. Some holders treated these coins like collectibles, others forgot about them entirely. Only recently, more and more of these physical bitcoins have been getting redeemed after sitting untouched for a decade or more.

From novelty item to time capsule holding real money, Casascius coins remain one of the strangest and most iconic relics of early Bitcoin history.