Interesting exercise! Your fitbit will be happy :-0

I'm more interested in WHY?
I'm thinking why do we need FIAT anyhow?
IF traders accepted BTC etc then that would be easy, but that would require mcar/visa to support BTC I suppose.

But my WHY relates to a simple App.
Why can't we have an app, that I can use on my phone that will 'talk' to an eftpos machine via "paypass/paywave" concepts.
my phone app does the math to convert BTC to the fiat amount, and takes the BTC from my account.

or maybe it sends the converted BTC from my account to an apple payment account or something?

What am I missing? (other than paper cash :-) )

BTC newbee