Only within the past year has gold exceeded its 1980 high. At the time in 1980 when gold was roughly the same price as it is today, the Dow Jones Industrial average was under 1000. So over the past 28 years, you have a 1100% return on the Dow, vs. a few percent return on gold.
Yes, gold is probably easier to trade. But its direction has no permanent bias, whereas stocks have an upward bias of 5 to 8 percent a year depending what indexes/stocks you are looking at. With stocks, a dumb person can throw darts at the newspaper listings, buy the ones hit (as long as several or more so diversified), hold for 20 years, and sell for several hundred percent or more profit. That same person can buy gold, and it may go up (it has doubled in the past several years), or may go down.
Besides being easier to research and trade than stocks, other advantages to gold include that it is a hedge (tends to move opposite to the stock market), and can move faster in the short term than stock indexes usually do.