Maybe this era of blockchain and Cryptocurrencies could be the era in which Once again there is a change in the center of world trade. Countries like China & Japan are already in the race to develop currencies based on blockchain or atleast inculcate blockchain to assist programs but USA seems to be conservative for it. As u said even Europe is trying to get into the arena now. I think USA will really fall behind if they decide to stay away from it but I think the global economies are such that soon US would realise their mistake and join the league.