Platinum is already up 12% on the year. It might be due for a little correction. For the past couple of years there have been times when gold has traded at a premium to platinum, but right now gold is less expensive than its rarer counterpart. For anyone interested in platinum, a good strategy could be to buy gold and wait until it is more expensive than platinum - then swap your gold for platinum and get more for your money. All in all though, you're right, the trend is probably for platinum to go up - however it is quite volatile (
Platinum Chart - Last 5 year) so you have to have a strong stomach and be confident that you're right.. If you're just going to sell as soon as there is a pullback don't even bother.