How can i make a physical coin? I would like to do this, to show bitcoin to other people.
I´m from Brazil.
A coin that securely holds a bitcoin private key and reveals the Bitcoin Address?
Casascius has created those, but the process was very expensive to do. He had to have a token company make a brass token with a Bitcoin logo on it. Then he had to get a hologram made that was would be harder to counterfeit. Then he had to securely get the private key onto the coin (via paper), without any mistakes (i.e., where a coin goes out without having correct amount of bitcoins on it).
He is now trying to come up with some "low security" coin manufactured using a laser engraver:
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http://bitcointalk.org/index.php?topic=41892.msg1588721#msg1588721Now with a paper wallet you have the exact same ability to show off how bitcoin works (private key / Redeem, Bitcoin Address / Load). And it costs nothing more than your time and the cost to print a sheet of paper:
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http://www.BitAddress.org
