>Imagine having to tell the economy it can only grow as fast as a specific rare metal is mined for money to continue to make sense
This is only the case if you have full reserve banking.
Under gold-backed fractional reserve there is no requirement that there be enough gold to back all the notes in circulation promising gold.
There are certainly problems with fractional reserve banking but gold backing is not a fundamental weak point here. Even IRL if everyone demands real dollar notes there is not enough in the banks and the FDIC reserves to pay it all out on demand if everyone recalled their deposits, they could not even run the money printer fast enough to cover it.
Yet somehow world trade still goes on, despite there being more value of goods in trade than currency than can back it.
Side note for completeness: theoretically all trade of any size happen with even a single gold coin by increasing velocity of money.
This is only the case if you have full reserve banking.
Under gold-backed fractional reserve there is no requirement that there be enough gold to back all the notes in circulation promising gold.
There are certainly problems with fractional reserve banking but gold backing is not a fundamental weak point here. Even IRL if everyone demands real dollar notes there is not enough in the banks and the FDIC reserves to pay it all out on demand if everyone recalled their deposits, they could not even run the money printer fast enough to cover it.
Yet somehow world trade still goes on, despite there being more value of goods in trade than currency than can back it.
Side note for completeness: theoretically all trade of any size happen with even a single gold coin by increasing velocity of money.