The Globe and Mail reports in its Tuesday edition that with the price of gold surging, more investors are turning to gold to add some juice to their portfolios and to hedge against uncertainty. The Globe's John Heinzl writes that central banks have also been adding to their bullion holdings. If you are keen on owning gold, Mr. Heinzl advises moderation. Yes, gold has been on a roll recently, but there are no guarantees the rally will continue. Moreover, gold pays no dividends or interest, so the only way to come out ahead is to sell your gold at a higher price than you paid for it. A percentage allocation in the single digits is plenty for most people. There are several different ways to invest in gold, each with its own pros and cons. If you want to own physical gold directly, you can buy gold bars or coins from an on-line dealer or in person. Regardless of where you buy your physical gold, you will pay a premium over the spot price of bullion. When you sell, you will take another haircut. These price spreads are not trivial. Bullion dealer silvergoldbull earlier this week showed the difference between the company's selling and buying prices for a one-ounce gold bar produced by the Royal Canadian Mint was about $250.