The Central bank of Nigeria has decided to go hawkish in the controversial global disagreement between some central bankers and market participants over what status to confer on digital currency trading and exchanges.On Friday, it joined forces with a swathe of these central bankers who have remainedlargely sceptical about the invisible money that has swept through the world, exceptperhaps in Russia and North Korea, where a dictatorship holds sway, in the often unspoken war against what some major global financial institutions and burgeoning online marketplace and e-commerce platforms have already embraced in their daily tradesand transactions – crypto currency.