Why are you so sure that a fractional-reserve model of physics poses any threat to Bitcoin’s cryptography? Isn’t it ironic that Bitcoiners reject fractional-reserve money as unsound, yet simultaneously fear that a fractional-reserve ontology of physics (where unmeasured possibilities are treated as real states) can somehow overpower the most sound, finite, verified system ever created? If fractional-reserve accounting can’t produce sound money, why would fractional-reserve physics produce sound computation?

That's intriguing, I'm pretty un-educated on the depths of quantum. Do you have any links so I can learn what you're talking about with fractional-reserve models of physics?