pdxleaf
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... Most blockchains associated with cryptocurrencies at least ostensibly exist to provide some useful service, and the purpose of the coin is to provide an incentive for people to maintain the blockchain (i.e. mine/stake transactions).
... The questions I raise are 1.) whether a decentralized blockchain is practically possible without a cryptocurrency (I think the answer is probably no), and 2.) whether a centralized blockchain (without a cryptocurrency) has much to offer that existing technology (such as massively distributed databases like Google Spanner and cloud computing platforms like AWS) doesn't already do...
Without considering your question of centralized vs decentralized blockchain, it appears there is agreement that the fundamental value in this technology is the blockchain, and the value of the blockchain is in providing a service. I think there's agreement that the fundamental service of a blockchain is to ensure ownership of an asset.
There is not agreement on whether there is value in a blockchain only being used to secure the cryptocurrency. There is disagreement also on whether cryptocurrency will supercede national currencies. I am in the camp of saying it will not. In some respects, cryptocurrency is like a an attempt to return to a gold standard where every dollar is backed up by physical gold that actually exists, similar to every crypto is mined and is limited. That's not going to work anymore than the gold standard did.
The only value in cryptocurrency thus far is its ability to be transferred easily and anonymously. That's not a service people need when they buy groceries and clothing.
To bring it back to this thread topic, no, I am not interested in Bitcoin. But I am interested in Blockchain.