You didn't mention it explicitly so just in case you didn't know, what you are describing is called fungibility[0] and is indeed an important property of money.

You didn't mention it explicitly so just in case you didn't know, what you are describing is called fungibility[0] and is indeed an important property of money. [0] https://en.wikipedia.org/wiki/Fungibility https://en.wikipedia.org/wiki/Fungibility