It's a trick of currency risk though. The denomination can make things weird.

The price of a gold piece could be $1000USD or $100USD . But if it buys you a loaf at either point of time, has the gold changed in value?

I have a joke that I believe BTC is going to $1M USD. But my fear is that so is a price of bread.

To explain the joke, I'm suggesting that Bitcoin might hit $1M each, but that it will actually be nearly worthless compared to todays purchasing power (alongside the USD)