Fast forward to the year 2100: If we manage to colonize our solar system, we will at some point be able to reach asteroids and planets with far more precious metals than we have on earth. With supply increasing, prices will fall. Bitcoin on the other hand, in 2100, will still be limited to <21 million
And you think they'll pull off deep space asteroid mining of gold at under $1300 an oz?
Scarcity does not always equate to value also techology moves fast, do you think BTC will still be the no.1 crypto that far in the future? My bet it is it will be a distant memory and state issued and backed crypto will be the norm.
Unless a new significant use case for gold arises within the next decades (which is not impossible, could be something space related), the price will go down to its intrinsic value (on computer chips and the likes). Jewelry, which is one important use case for gold right now, is quite useless apart from being a part of our culture. Once people start to realize this, gold will go down in price. At the very latest, the price will go down once supply increases.
On Bitcoin existing in 2100: It's absolutely impossible to predict that far into the future. The scenario was hypothetical, and deliberately exaggerated in order to make the point, that while the supply of gold might spike at some point in the future, Bitcoins cannot.