Maybe in that country, bitcoin is considered as the currency used for evil crime in cyberspace, example as drug trafficking, because sometimes selling drugs on the Internet is using bitcoin. In addition to drug trafficking, many money laundering and hackers using bitcoin. It is why some country prohibit the use of bitcoin.
In every country people are doing this stuff no matter how much you want to stop it. You just can't, they'll be present at a time or another. This happens with every currency that exists in the world. Of course the criminals might prefer Bitcoin because it's anonymous, but if it wasn't Bitcoin it would be USD like it was until now.