Tesla stock

Absolutely.
Scarcity is what crypto currencies are built on as well.

Many of these are self imposed scarcity though. Crypto uses computer power to limit crypto coins. Diamond mining is, as I understand it, limited so as to not flood the market.

Even with gold backed dollars though, as populations grew and more dollars were needed, we can just change the exchange rate. Same amount of gold, more dollars.

Either that or you impose deflation as the number of people buying and selling goods and services grows.
E.G. Congratulations, last year you earned 1000 gold coins. This year we are paying you 750 gold coins because we have more people working.