economic growth is only investing in gold whose selling price will not affect the value of the currency, I think that's what I understand.
I think economic growth is not dependent on gold, bitcoin, currency or any other financial instruments. Economic growth is seen in the lives of people reflecting in good standard of the living of the people, reduced inflation and rise in the access to the public amenities, employment for the people , security and shelter, abundance of food, high value for currency and other things making of life to be better. Cryptocurrency or bitcoin will not able to achieve that or not gold but government.