Bitcoins Casascius physical bitcoin coins

Casascius Bitcoins are physical coins you can hold - and each one is worth real digital bitcoins.
Bitcoin is the most widely used open-source peer-to-peer "cryptocurrency" that you can send over the Internet without a bank or a middleman.
Each Casascius Bitcoin is a collectible coin backed by real Bitcoins embedded inside. Each piece has its own Bitcoin address and a redeemable "private key" on the inside, underneath the hologram.

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