2020 will be the year when more governments are going to be including blockchain in their systems to become more transparent and more reliable in order to offer a better service to their citizens.
Why is it that you decided that countries should make their national digital currency on a transparent blockchain? In most states, corruption thrives, which is beneficial to the governments. A transparent blockchain will simply not allow corrupt activities.
Gbam, you just nailed it there. Many countries including mine wouldn't risk the idea of having a Blockchain and her digital that will stand as a transparent tool for their monitoring, rather they would like to continue with their usual ways. Most corrupt countries wouldn't dare to imbibe the idea of Blockchain and digital currency alongside decentralization, this will deprive them from fraud.