This is actually not true, as 1 USD does not equal a static percentage of all USD. If you look at the stock-to-flow of storing value in USD compared to Bitcoin or even Gold, it's immediately apparent that USD or central bank backed fiat currency is an exceptionally inefficient way to store value as it's being debased at alarming rates.
This is why $1000 was worth way more in 1980 than it is today.
Edit Note: I actually just re-read your comment and realised I misread. I read store value for an infinite amount of time