You have a good hint on this, and the more and pressing the demand for it, the more the value, which might later be causing the scarcity-induced price hike. It will be insane by then, provided the demand has become bitting at the time, and not what we still see now.
I tell you, if the total supply of Bitcoin is 50 million, the price will stand at the current level, that is what @Ambatman refuses to acknowledge. So, for now, it is not about the scarcity, Bitcoin is still readily available. The natural value attributed for being an asset itself has diven Bitcoin this far.
You made this example so arbitrarily and if you expand it like if Bitcoin has total supply like Ethereum, its price will stand at the current value, it turns to be very wrong.
You are the one who is wrong here. Have those coins with the lowest supply reached the rooftop? It's fine if you do not want to face reality.
You are comparing Bitcoin with Ethereum, how naive is that? Bitcoin will always be Bitcoin, and Ethereum will always be Ethereum. Do not mix them or misrepresent them, as their class, value, structure, and appreciation by people differ. If you have another Bitcoin with a different supply, that's what you can use as a perfect example, otherwise, the general economics will always prevail, whether you like it or not.