It's goldline, not gold itself. In fact, gold is the most stable of all methods of exchange. Consider the following:
1) In 1913, one ounce of gold could get you a couple of decent suits, a nice hat, a pair of shoes, and a night on the town - Cost in dollars? About 20.
2) Today, one ounce of gold can get you a couple of decent suits, a nice hat, a pair of shoes, and a night on the town - Cost in dollars? About 1200.
Does anybody see where I am going with this? Gold is the most stable of all currencies, and has remained so since Roman times. It has never lost it's purchasing power. The dollar, on the other hand, has become more worthless. In fact, most currencies throughout the world have to be adjusted for inflation. In the USA, it is much worse, because we have a Federal Reserve that prints money from thin air, thus weakening it's purchasing power. Add to that the concept known as fractional banking, Where 10 times the money authorized by the Fed can be created out of thin air, and the problem becomes obvious.
It doesn't take a rocket scientist to see that, over the long haul, gold is a damn good investment, just as long as you don't get sucked in by the scams that appear on Glenn Beck. In the end, investing wisely in gold enables you to avoid the most insidious tax of them all - That hidden one, known as inflation.