yea don't buy gold with plat. if you buy plat try your hand at locks, with the price of locks its impossible to lose money but you won't make as much "more than likely" as if you were buying ankhs.

I'd try marching. Learn prices and buy low sell high. Don't rush to sell anything be determined. I usually make at least 500k a day if I spend it marching which I normally don't because I'm lazy