lj: TGB might be a way to play copper. Their Florence mine in Aridzona is expected to come on line at the end of this year.
But, to your point, if metal prices stay up, and unemployment increases, I think we might be in for stagflation.
I bought TGB around $2 or lower maybe 8 years ago, and I'm still waiting for the big payoff.
Also, if China goes into a recession, forget copper.
According to what I am hearing, gold is becoming the new world reserve currency.
Bobwins EQX is a good way to play gold, imo.