There may be a slight shift away from the US dollar as crypto-currencies shift, but the overall power of the United States is not likely to change. Even if everyone adopts crypto -tomorrow, the USA will still have enormous power military and economic influence in the world. This power is from exporting things people want. Iron, Salt, Food, Gold, Tea, and Oil have all been commodities of international power. While I can site 20 trillion reasons why I think the US government has been irresponsible, most foreign governments have been more irresponsible.