If the silver price would increase substantially, miners around the world would simply ramp up their
operations, which would cause the price to revert to previous levels.
It takes decades to bring new supply online like that. First people have to be motivated to go out into the jungle and desert and god knows where to start poking around looking for places that might potentially have some metals. Then they have to actually find something. Then they have to build the infrastructure. Another thing that people don't realize is that when the price is artificially low producers of existing mines are forced to abandon more and more marginal ore to stay profitable, they cut their operations to the bone, and all the supermarginal ore that they neglect they cant just go back and get later. It's for all intents and purposes lost forever.
The price suppression that we see today is planting the seeds for a future supply collapse that will take a very long time to re balance.
But your point remains taken, it will eventually rebalance where that can never happen in bitcoin.