nope and nope also. If you make gold and silver move as crypto they can provide a huge trade base. The reason to use these is very clear: Governments mismanage the fiat coins at their will serving interests that are alien to the people.
You are talking about crypto supported by gold/silver, it is not the same thing.
Sure if crypto-currencies will be supported by real gold,silver, etc., it will just increase the public´s trust which will lead to globalization of crypto usage in entire world. In this case it makes sense, but to trade with real silver coins in your pocket is ridiculous!
Yes, I am talking about 21st century technology because that is what we have now. You see, highways would serve little purpose if you insist on using horses.