Quantitative Easing injects new money into the economy, devaluing money. But my bitcoin is only worth $10,000 USD if that's the amount you agree to pay me for it. And you will pay me using existing money. So there is no new money being injected and so it would seem there is no devaluation of old money.
But it feels like maybe you're right. I think existing money is essentially being devalued every time someone decides to spend their USD on bitcoin, demonstrating that a new thing that came out of (more-or-less) thin air now has value, and thus those who own it can 'claim' dollars, and thus there are less dollars for all the people who don't yet own bitcoin. Which means they are getting poorer.
My head hurts. Can someone smarter than I figure this out?