can governments and worlď bank later support cryptocurrency
They have to. Even if they do agree or support it, they might have to. Can't say much about the World Bank though because it usually prefers Gold and Dollar but in next few decades, the cryptocurrencies are expected to take over fiat currency and the inflation will put it above Dollar. It will also depend much on governments role in future adaptation of cryptocurrencies in the mainstream transactions. But everything is possible, because the People are going crazy after cryptocurrency, and soon it will be a norm just like fiat currency. A better security and sustainability in cryptocurrencies will definitely trigger adaptation by authorities.
the world bank can go against cryptocurrency right now and even the government and the reason is that they kniw cryptocurrency is a parh to freedom for everyone one.
if they had known that this is what the Internet will cause they will have stopped it, if they had know what will come out of it.
internet has opened the eyes of people to see beyond what that think is possible and internet as birth cryptocurrency