Bitcoin being transferred overseas would not necessarily trigger an export nor an import from the country the bitcoin is being transferred from. It would be very well possible that someone from country A send money to country B to have a product produced in country C shipped to country D.
But equally it could and does, but I get your point and agree.
Additionally imports and exports are measured by the value of goods into and out of a country, not by the value of currency that flows into and out of the country.
I am not sure if you are being serious on this. If you are, please take a look at just about every other country in the world other than your own, and how their currencies are valued compared to say the USD, and why their currencies are valued this way.
Please don't get me wrong, I am all for Bitcoin, but it is important understand the barriers, so they can be overcome, and society is a complex environment and it is not to be underestimated.