How do you extract some useful information from 1BTC=1BTC when you need to pay rent, or an electrical bill, or buy food, or get paid for some form of future job?

There already is a market measurment of bitcoin in terms of fiat. There are also market measurments of bitcoin vs gold & gold vs fiat & fiat vs fiat. These measurments aren't going away. And they are going to print trillions more in fiat.