I don't think many altcoins will have survived until 2140.
Maybe Monero...
It was the same back in the 80s with internetworking protocols. TCP/IP was the dark horse. IPX looked promising, but where is it now?
IPv4 looks "ancient" and "spartan" compared to IPv6 (paltry adoption), but network effect (aka Metcalfe's law) is what matters the most, not being feature-rich.
We also don't know how humanity will be by then. How big the population will be (100+ years is a lot, we could have WW4 by then!), what kind of technology we will employ (a Dyson sphere could let us bump difficulty up to 192 digits).
I also don't believe that BTC's price/valuation (or more correctly: purchasing power) will ever stabilize to a straight line.
Every 4 years (until 2140) we will see a price increase, but with ever diminishing returns in every new cycle. Hyperbitcoinization (due to hyperinflation) might play out differently (constant parabolic/geometric growth).
Even in a potential BTC standard, I expect commodities such as oil and wheat to require less sats every 4 years, since BTC is deflationary.