Well yeah it could be done. But bear in mind national media is the concern of the govt of a country. If you are promoting btc to kills then you may be banged up in jails. Or if you advertise about buying drugs then you could see the punishable consequences.
If govt support btc then you need to promote good things. And in the coutries where btc is not accepted you should be think 10 times before you are making an attempt. Cause there will be some harsh experience may add in your timeline of life.