Naaah...
Fiat will be around. Bitcoin will work side by side. People still use dial-up modems, people still use carbon copy paper for credit card swipes, etc.
Progress is slow. Change is financially and emotionally expensive and people are reluctant to do so. AI and related concepts have been tabled for half a century or more, and yet I still can't get a useful electronic assistant on my phone/PC/whatever.
Bitcoin is a novel technology and it's exciting to be part of it, but I'd be pretty shocked if my Mum uses it once in her lifetime. So who even knows what BTC/USD means in 10 years? 50 years?
I fully agree with you, that bitcoin progress, if progress, will be slow, for exactly the reasons you mention. However, some people here argued that bitcoin is going to drive out fiat in a matter of years or at most a decade or two, talking about S-type curves of adoption of new technology, like internet or mobile telephones.
Still, on the other hand, maybe I'm being too harsh on bitcoin, because we have plenty of example technologies. Who even remembers net cafes? Remember travelling without GPS / tripadvisor / google? That only took a decade-ish.
Indeed, but, as you said, bitcoin is not just technology. On the level we're talking here, bitcoin is big money, and big money is conservative and needs trust. However, if bitcoin progresses so slowly, then the speculative drive will not keep up very long. What good is a kind of money that doesn't even buy 1% of the stuff after half a century (and is not geographically enforced, as fiat is) ?
If what you say is true, that the 1% level would only be reached in half a century or so, then bitcoin already came to maturity in a sense. The price today is then even an over estimation of its fundamental "money" value in the near future (which is what its speculative value would be).