Everything in the world can be valued in terms of something else. There is no wrong or right about it, it's simply how it works.

I can say that computer monitor costs $150 dollars.

I could also say that computer monitor costs 41.66 gallons of gas. This is because today 41.66 gallons of gas costs $150 dollars (or 1 computer monitor).

All three things can fluctuate and change relative to each other. Tomorrow gas could cost more dollars per gallon, and if dollars per monitor remained stable you would be able to pay less gas for a monitor.

Of course we don't think this way because we simply price everything in the most common form of money we use daily, your local fiat. It's perfectly natural to price a new currency in your local fiat as well.

If you don't agree, sell me your house for 1 bitcoin. Don't base the value of that bitcoin on your local fiat, trust me, it's worth as much as your house.