It cant exist ... because the edifice of prosperity is NOT based on how many yatchs (or gold bars or bitcoin ) you own .. it is on the fact that everyone could afford bread and clothes and a shelter .. commodities

In a fixed money supply situation - commodities go to zero .. no one will plough the fields becuase only scarce things attract value ... culture of scarcity .. NOT abundance ..

Even today - if you stop subsidies - do you think anyone will do farming :-)

Eventually - people will collectively agree to contribute (tax) to support the farmers and coal diggers and water systems and construction workers .. and then the whole story of perversion of fiat repeats ...

To answer your question - GDP shall fall to near zero .. till people realize they fucked themselves :-)