Some People are like confused in comparing the price of Pi at GCV to BTC
Let me help you out
The diffrence in them is that BTC is a capital investment crypto currency while pi is a community development currency and the community can decide their rate themselves.
When trade by barter started, it was people involved that decide their rates of exchange i.e a cup of rice goes for a pair of shoe.
Pi community can decide to use GCV rate.
Is as simple as that.