Because that fiat paper currency is working out so well for everyone, right?
Actually it is working fine. Our problem is government spending and regulations not an unstable money supply.
It is also a myth that we ever had a real “gold standard” for anything but brief periods of peace. Every war knocked our monetary standards for a loop.
Switzerland has a paper currency which is very stable. But they also have fiscal discipline.
Gold is no panacea. Look at the history since 1974: dramatic increase in price followed by a price collapse and a couple of decades of little movement then an explosive price increase. And the history of gold standard regimes prior to 74 shows great government manipulation of the gold market to attain their monetary goals. It is also INHERENTLY deflationary with a bias towards recession. This essentially is why it will never be a monetary medal again.