Actually, one other important note: 1USD isn't really always 1USD in the sense that imports become relatively more or less expensive for Americans in America. R

Actually, one other important note: 1USD isn't really always 1USD in the sense that imports become relatively more or less expensive for Americans in America. Reserve status doesn't really correlate too much. Check out DXY. You'll see that as compared to a basket of other world currencies the USD has ranged substantially, from 0.76 in 2012 to as high as 1.02 in 2016. [1] Being the reserve currency more often than not means that its a unit of account. [1] https://www.investing.com/currencies/us-dollar-index https://www.investing.com/currencies/us-dollar-index