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1) Yea it uses power, but so do all the millions of machines that are used for banking. In fact, if you compare them, Bitcoin is extremely efficient.

2) Well, first of all you're just talking about the current state of the blockchain. Perhaps in the future we can 'archive' transactions so they don't have to be downloaded any more. Furthermore, you're talking about 10~20 years time from now. By then 10TB will be irrelevantly small. Nowadays you can already buy a 4TB hard drive for like $100.

3) Eh what? First of all this point doesn't even make sense, but Satoshi isn't even needed any more. The work is fully open source and it's now being led by the community.

Anyway, I really don't see what you post has to do with OP's question. You're not answering him, but just repeating some old refuted fallacies.

The banking system handles millions of times more transactions than Bitcoin. The entire Bitcoin network has less transaction throughput than a raspberry pi in a shoebox.

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