It might try that, but most of the people are a great deal less trusting of the government and its intentions than in the 30s.
More likely would be that the feds would make any kind of transactions with gold/silver to be illegal in an attempt to make PMs worthless in a practical sense. Which I don't think would fly.
I suspect that if things got that critical, we would see armed confrontations between citizens and whomever the feds used to enforce their edicts.
In the event of the latter then blue helmets make for fine targets.