We do not know if the Nigerian government actually has cryptocurrencies and bitcoin, perhaps it disqualifies Bitcoin because it does not want its people to emerge towards a totally deflationary economy and achieve their financial freedom, in every government it is convenient for them to have total and absolute control of each economic movement, if cryptocurrencies enter they will see it as money laundering, then it is not appropriate and if a country that has inflation problems is unsustainable, I see it from that point of view, perhaps it is wrong, but it is simply a assumption that it can be real, and that is why it disqualifies it, the more ignorance it is sown, for them the better.