RPM
The money in Forex trading and options and other derivatives can be insane, but the risk is generally commensurate with that, especially if your friend is doing anything on margin (as is usually the case in Forex trading.)
newbie666
While a wonderful currency, gold is a terrible investment, generally speaking. Over the very very long term you'll outperform inflation generally, so it beats for example a savings account at your local bank, but the only way to make any real money investing in gold is with timing -- and that holds true for all commodities, nothing to do with gold itself.
Phaedrus