There is no potential scenario where that happens even long term. People have to physically live somewhere. Nation states continue to hold a pretty effective monopoly on violence. They can prevent you from entering, or put you in prison, or seize your assets by force. Global, trustless, decentralized networks can't control government security forces with guns. The value proposition of central governments will continue to grow, not in the sense of people actually liking them but simply because there is no alternative. That is reality and no amount of techo-utopian fantasizing will change it.