I was thinking about this idea of deflation / inflation and i realized i am seeing this from the perspective of fiat vs bitcoin

I dont think this line of thinking is really great but am unsure of which direction to go.
This is the first time in human history we are dealing with a truly "global" currency.


I remember reading someones post in these forums of how he had saved up.012 bitcoin, which relative to him and his purchasing power in his country, this was an immense amount. I believe he stated his yearly earnings were about $250 usd.

With this example in mind, lets consider if bitcoin (hypothetically) did become the worlds reserve of wealth.

In terms of purchasing power, how would we perform transactions that addressed the parity of say buying a coca cola in his country vs the US?

Lets say in the US it was .001 (for arguments sake), because of the 1:1, there would be a complete disparity.

Unless i am missing something and not thinking this through.

Any thoughts?