I feel its america.also china but they still trying to solve the bitcoin banned issue to thier country.
Yup you are right the America is now showing the great interest in the bitcoin at this time because all the people are having the bitcoin fun and the value of the bitcoin is now increasing more an more I can see the positive growth of the bitcoin for the very slow price and the valuable income of the bitcoin I know the fast growth of the bitcoin will give you the real value and this is the reason why the bitcoin is increasing.
It is not USA which is showing a keen interest in bitcoin. In fact there are number of other countries as well. According to my knowledge, the country which trade the most in the world of bitcoin is Japan and China. Both these countries are taking positive steps in making the best possible use of bitcoin in their countries. I am very much positive that soon we are going to hear some good news.