I think that Korea and China are the most influential countries in the world of Crypto, this is proven when the value of BTC dropped very far yesterday because of bad news about Crypto spread in China.
their citizen really conscious about technology.so no doubt their country give big contribution in cryptocurrency market.if from these country we heard good news, its directly impacted to bitcoin price
South Korea already regulating cryptocurrency and many their people have good knowledge about cryptocurrency. China will make crypto market more bigger if government allowing their people investing on market. Beside both country, never forget Japan because Japan is one of first country that allowing bitcoin for payment