That is why they are investing much in bitcoin, so as to secure and safe the future from any dependencies, it wasn't easy, because to invest also requires financial aid, as money in volved for you to buy a profitable asset like bitcoin and hold over time, then pay back in fiat after taking your profits.
I wouldn't think the GDP would be much more bigger than what it is now due to BTC, but surely - there are creams to gather from such an activity, and it brings the most awareness to other countries, especially.