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What is not to like. freebeard has the ultimate security, but pays a minor price for it.
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I met one of the Internet greybeards once, don't recall his name. He was quoted as saying that the three legs underpinning Internet were anonymity, authentication and digital cash.
We got the first two, and if Bitcoin protocol had existed from the beginning we'd have had the third, but the CC companies got in first.
The problem with cards is that they expose the account with each transaction, where with Bitcoin only the transaction itself is exposed.