Actually i'm start thinking about that since yesterday, because yesterday when the price of bitcoin decrease, China bitcoin market like Huobi is the first one that make bitcoin's price fall down. Because of that i'm thinking that China have a big affect into bitcoin and the price too. I don't know is it right or not, but it's my opinion.
Yes I agree with you, most of bitcoin is traded using chinese yuan. China has really big domination of bitcoin. But I am sure that it will not forever. Becouse big country lime USA, Russia and Japan is try to be big player of bitcoin too.
I don't think the countries you mentioned will ever be able to overtake China's leading position in Bitcoin. Bitcoin is definitely popular there, but no.
If I have to name up a country with the potential to surpass China, then it has to be India due to its size and possibilities of growth.
It's a fact that in wealthy countries the need for something as Bitcoin is very low. It has to come from a part of the world where wealth isn't directly available to the majority of the people.