NEW YORK ( TheStreet) -- I have consistently advised investors to gain exposure to gold through the use of various ETF products. With economic turmoil still raging across many regions of the globe, prices have risen to staggering all-time highs, making for an attractive destination for frightful investors.With discussions heating up this week in light of the G20's meeting, the prospects for the yellow metal and the funds designed to track it appear promising. IAU) and SPDR Gold Shares ( GLD) track their own respective stockpiles of physical gold held in vaults around the world. These funds are designed to rise and fall with the changes in the prices of the actual metal. In the event that central banks around the world agree to adapt a gold standard, they will have to increase their stockpiles of the metal. This uptick in demand would, in turn, drive prices higher, benefiting IAU, GLD and other products boasting exposure to physical gold bars and coins. If a gold standard is implemented and central bank demand for gold takes off, companies such as Barrick Gold ( ABX), Gold Fields ( GFI) and Goldcorp ( GG) which are responsible for unearthing the commodity will see a lift as well, benefiting from rising prices. A number of ETFs dedicate their portfolios to companies in this market space. The two most popular products which investors will want to keep an eye on will be the Market Vectors Gold Miners ETF ( GDX) and Market Vectors Junior Gold Miners ETF ( GDXJ).