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Yes, in that case makes sense. But probably not for onchain btc. You can do something similar with ecash.
In any scenario I can imagine where power is out AND someone is willing to take my bitcoin bearer instrument, things have gotten so bad the power probably isnt coming back on.
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Hadn't heard of this project before. Kinda cool, though. I don't think I'd ever want to use a physical bitcoin instrument like this (electronic money is cool), but I like that they're trying things. Thanks for posting!