I think that the best country for Bitcoin is China ,
China has a big market . Japan is also a good choice , they have a new Bitcoin leader , they can support mining , training and finally exchange to cash .
Russia , UK , Dubai , India are also a good country for Bitcoin.

Mining is not anymore profitable because now   Bitcoin is very hard to be mined with weak machines . You have to invest thousands od dollars in powerfull processors in order to earn a little profit . So , I would recommend you to invest straight in Bitcoin or ethereum  because it is easier , and the price will surely go up in next years.