Picky, picky, picky
First rule in trading is trading something you know the most about.
There's a finite amount of gold but unlimited fiat currency. Governments worldwide are spending beyond their revenue. National debts are increasing exponentially. Economies are suffering and business are increasingly burdened with regulation. Volatility is to be expected.
I don't know about your calculations - mine indicate the need for gold and silver as part of a wealth preservation strategy.