If you're a retail business that sells RAM then yes, this is the way.

If you're a fund that holds RAM in some indirect manner (like you hold hypothetical RAM futures) then it depends on whether your country's laws ask for market-to-market value for that specific kind of security.

France didn't pay taxes on the gold, so it didn't keep it "on the books" at decades-old prices. It tracked the real-time value.

However, that doesn't mean there isn't profit possible, even over a supposedly super-liquid asset like gold.