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Re:A Prediction: Bitcoin Is Doomed to Fail by eru on Thursday November 28, 2013 @05:34AM (#6813959)
Zerocoin is trying to solve the second problem.

Combining 5 proof of work standards just gives you 1 new one. (There might be some robustness to be gained, though.)

Re:A Prediction: Bitcoin Is Doomed to Fail by waps on Friday November 29, 2013 @06:53PM (#6821567)
Cool, I didn't know about zerocoin. There goes my afternoon.