Why a 4% return is better than 40% - Yeah right!

Oh bugger, I have gone and invested 90% of my retirement savings in precious metals and have achieved a 5 year annualised return of 40%. What I should have done according to CNN Money was invest in a diversified portfolio of international/domestic shares and government bonds managed by professionals and been extremely happy with a 5 year annualised return of 4%. I am so disappointed that I did not hear this valuable advice earlier :-(