“why ?”
This all makes a lot more sense if you look at it from the other direction.
Thanks to years of deficit spending and money printing the US fiat dollar is now worth only 1/3 of a gallon of gas, or 1/1200 of an ounce of gold. If this country doesn’t change course immediately I would expect the US dollar to shortly be worth only 1/10th of a gallon of gas or 1/5000th of an ounce of gold, or perhaps far less.
Bullseye!
My Grocery bill agrees with your analysis.