Invest my hard earned money in metals

I am wondering where is the safe place to save or grow my money, be honestly, i simply lack of confidence to keep my money in banks and also fed up with their given interest rate. The interest rate was too low till i didn't feel like saving my money into FD accounts. Perhaps i should think of investing my hard earned money in Monex Precious Metals, which it leads to wealthy eventually. Investing in something safer is more guaranteed, what's more money is quite hard to be earned lately due to economic crisis. I could foresee our future, a family which has 3 kids definitely needs more expenses, so i really have to wise spend my hard earned money in order not to waste any cents.