It is not an eternal law of nature that the dollar shall always be number one. The pound sterling had the top spot in the nineteenth century, only to be surpassed by the dollar in the first half of the twentieth century.
美元永远是第一，这决非宇宙真理。十九世纪拥有顶级地位的是英镑，但在二十世纪上半叶就被美元超越。美元也有被后浪拍死在沙滩上的一天，但肯定不是今天。