Bitcoin is getting known in really big countries now a days because of its popularity people indulging themselves to the most popular thing on earth but to be honest we are not yet on the quarter part of those people who uses money on earth, but still despite of the declining value of btc we are still surviving and managing to turn the tag on green in many times.
To be honest in some countries which called "developing" uses bitcoin to scam others who were innocent on using them which makes other bother to invest on to it. And so far bitcoin did not give any marks of affecting in economic growth on one country.
Yes that is right to say that currently bitcoin is too much popular in modern countries, but in backward countries still people do not have any knowledge about bitcoin, i think still need to know about it, because i think that in current time even in backward countries they have the facilities of using computer and interest therefore i do not think that there can be anything that can create hurdle in bitcoin way.