go on
Discussion
the value of something depends on the persons involved, time, supply, and demand
there is no anchor “perfectly stable” valued item you can use either, and even if it existed, it would not have the same purchasing power at any given point
for example, with bitcoin, which is obviously not a stable store of value due to it being speculated on, even if it was stable, it is not immune to for example trust in it being shaken up due to the difficulty of forks and quantum computing risks
value is all speculative and subjective. i suppose it's a function of perceived future value that is being "stored". so there's no physical storage of value. so you're right.
A better factor is how a currency may perform in an environment with everything having a fixed and static value.
Bitcoin right now has too much volatility, and the USD degrades its purchasing power via inflation.