As long as there are central banks, money printing, purposeful mass inflation, currency devaluation, quantitative easing, massive government borrowing/spending, purposefuly manipulated treasury markets, zero % interest rates, etc....well, gold/silver/PM's will keep rising. They are a persons only hedge against lunatics in power, on TV and other idiots who move the levers.
As Adonis said, and I agree, land is not something to be dismissed either. Especially the land that is arable, near waterways etc.