I appreciate your thorough responses and patient explanations about the weaknesses of bitcoin. I agree with you that bitcoin is not perfect, nor is Linux, but I

I appreciate your thorough responses and patient explanations about the weaknesses of bitcoin. I agree with you that bitcoin is not perfect, nor is Linux, but I enjoy using both. By your standard, we may have to wait a very long time to enjoy decentralized digital currencies. Bitcoin could go the way of Linux and over many years see gradual improvement in security and usability. Or it could suffer a debilitating attack and cause a massive loss of confidence. Either way, it's here today and that's better than potential currencies with formal security proofs that are years off.