It is true that BTC is illegal in some countries,but I think it was expected when we know that different people think differently and different countries have different opinions in terms of some things,and that including BTC.But when we look at the countries who ban/declared BTC as illegal we may see they come from all continents and there is poor and well-established countries.I do not know it is true,but one country which banned BTC is Iceland,and there is a list of few more: Bangladesh,Taiwan,Kyrgyzstan,Bolivia,Ecuador,Vietnam and recently Morocco.

Regarding your second question,are you asking people are aware of cryptocurrency or that their countries make them illegal?

I think that the knowledge of the existence of BTC and any other cryptocoin is still relatively small if we consider the whole world,but it is certain that every day it increases more and more.