I think we have to differentiate between two aspects here:

1.) Will we go back to a system like Bretton Woods, i.e. a system in which currencies are tied to gold?
I don't think so, since I believe that governments would currently not be able to agree on such a big step, although it would arguably give us more stability. Moreover, the system, if not designed properly, could fail just like Bretton Woods, in which the US, during the Nixon shock, could not guarantee any longer that it would exchange USD for gold.

2.) Will we use gold and silver coins as currency?
Absolutely not! As has already been argued by several other users here the tendency goes towards abolishing the use of paper money and coins at all. The only situation in which we could see a return of precious metals as currency would be during a severe economic shock like a war or hyperinflation.