You can only bring back the silver $ if it either: 1) is the size of a dime, but less purity; or 2) call it $20.
So it is safe to say that these two metals, for most of human history, have been used for little more than decoration and a representation of value...mainly because they had very little practical value. When they were used as a medium if exchange were they used as such because they had inherent value or because they had little other practical use. Was a Morgan dollar valuable because the silver was inherently valuable or did it represent value above and beyond their own inherent or practical value? I other words...was it the silver that was truly valuable or did it represent value the same was a dollar bill, something with very little value, represents today.