Why do we think Dyson spheres exist. It's completely conjecture.
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Edit to resolve Poe's law ambiguity: this is a parody. Obviously aliens would have lightning network which would require a smaller overall dyson sphere
So you think an alien civilization advanced enough to build a dyson sphere would not know how to leverage it for the fundamental goal of implementing blockchain?
I guess it's true what they say: there's a sucker born every minute.