Consequently, it is helpful to start using money concepts to describe it compared with other currencies and other assets.

You are right. I was tempted to write about monetary comparisons, global money supply percentages etc, but I had to suppress myself in order to keep it in context (gold comparisons as the price approaches parity).

For the uninitiated it often sounds preposterous that Bitcoin can be more expensive than Gold...

Gold no longer has all the hallmarks of money principally because it is too complicated to use as a medium of exchange. It is now seen much more as a store of value.

I'd note here that in western / developed countries gold transactions are almost non-existent, yet in some developing countries gold is still used (not officially though). It kind of depends on the location.