There no such thing as a “stable medium” in money. In so much as the denominator of the money supply is fixed, unit purchasing power will increase so long as technology is driving down costs across society. Conversely if the denominator of the money supply is inflating, unit purchasing power is always declining in the absolute sense. So in either of the above cases, there is no such thing as “$85,000” outside of the present moment as $85,000 is worth something different than it was yesterday and what it will be tomorrow.

A monetary protocol can be stable. The value of money however is never stable. It moves in one direction of the other always. There is no resting state.