There is no logic in comparing BTC with ETH, especially since the latter switched to PoS, and there is still no clearly defined max supply (if something has not changed in that regard).
I tend to agree but I've mentioned it because some people seem to fear the scenario where Bitcoin isn't among the best performing assets, and ETH already has reached that "stage" a lot of time ago and has still some demand. The max supply issue and PoS are secondary, Ethereum still has at least "controlled" supply (in fact it had less supply growth than Bitcoin since 2022 [1]).
The supply issue being secondary is also based on my observation that when you compare altcoins' performance, there's not much difference between those with a Bitcoin-like halving scheme (LTC, Monero), a steady-inflationary scheme (Doge) or a completely static supply which "should" in theory be the "hardest" and "most scarce" type of cryptocurrency (I remember NXT and NEM with that, they're now almost insignificant). All the focus on supply ignores that demand variation in crypto is actually much more important than most differences regarding supply (there were some "hyperinflationary" exceptions but I think these don't count because they always were tiny). And most altcoins have either a sideways or slightly bearish market (LTC, ETH) or have been strongly long term bearish (NXT).
Regarding the comparison of BTC in relation to the Swiss Franc, as in many other discussions of a similar type, I am not too optimistic that something like this can happen (at least not in the near future) precisely because of the fact that Bitcoin is decentralized and the path ahead is very difficult and full of obstacles that require a lot of consensus to be solved.
It would be interesting which obstacles you see. I could imagine scalability being one, which has already some solutions (some of them are quite new and experimental, like Ark).
I think Bitcoin is being prematurely labeled as digital gold. That part is in the future, when Bitcoin grows over 1 million usd in price. Right now I would still consider Bitcoin an early player on the international currency stage.
Interesting post with a fresh opinion, I think I agree somewhat -- I think the "digital gold" and "digital cash" can come in parallel, because the currency use would provide the liquidity and stability that Bitcoin needs to be more interesting as a (less speculative) saving asset.
[1]
https://etherscan.io/chart/ethersupplygrowth