Hello. The rate of bitcoin and ETH related to fiat currencies certainly cant be called stable. How can sellers set prices in such conditions?
It is stated in
Whitepaper that seller can choose the way he price his products - in cryptocurrency or fiat (that would be converted to cryptocurrency on the day of order).
Your solution has one significant drawback its linking to particular countries. How then can there be shops that accept exclusively local national currencies?
Don't think countries. E-commerce is already global. The only barrier here are local national currencies. We've just cut that.