So the interesting thing is that even if a nation like El Salvador adopts it it won’t make them a super power. They’re just too small. A lot of African countries will do it very well and significantly improve their nations wealth. 
But out of the top 10 nations currently by GDP. 
my money would be America, china, Russia, India, and Japan as the top 5 nations to successfully adopt it. 

What do you think ?:)