I do not think this is possible, because they already have financial power. In addition, if cryptocurrency were invented by governments, then it would not take 10 years to develop this topic.
Nothing is certain and we cannot predict who created it and for what purpose. But whoever created has revolutionize this space and digital payments has changed after the blockchain technology has come into picture. Things could be processed so faster and with almost no fees is the game changer. It has made so many people millionaires who had invested in right cousins and at right times.