Meanwhile in the real world we often find new deposits of gold, and if we ever make it to space presumably we’ll find a whole lot more of it (perhaps infinite amounts).
but until space we have a finite amount of gold. Current known gold mines will be mined out at around 2030 and there is about 30 - 100k tons of gold left in unexploited gold.
Around 30% of known gold in the earths crust is accounted for. Nations included in the "BRICS Meme" have been purchasing large amount of gold and would like to see us return to a gold standard for monetary and policy reasons.
To your last question, bitcoin is just digital gold. Unlike ethereum which is inflationary.
[1]: https://river.com/learn/terms/c/change-output