This level of understanding is far above the norm, and it would be good if others understood what you make so clear in the his post.
Volatility is the enemy or opposite of stability. Which is what people seek in a unit of exchange.
I do understand that you need to own assets not dollars during periods of high inflation to preserve the buying power of your labor, which is one of the Bitcoin maxis claims. And Which is true longterm for bitcoin, but it’s day to day volatility makes it an unfit medium of exchange.
I agree that algorhythmic stables are the solution to usd due to political issues, freezing and seizure issues, which make it undesirable as a global currency, and a stimulus for a BRICS currency, but all must realize the huge network effect and first mover effect of usd which makes BRICS currency theoretically viable but realistically not possible. In the future maybe.
Your idea of the dollar becoming a unit of account is an amazing one and certainly one version of the worlds future.
Bravo