I agree with everything Camaro said save the comment about gold being fairly valued when compared to other assets. I will admit that gold is far closer to fair value than it was 10 years ago, but believe it still has a way to go. Of course gold doesn't suffer nearly as much price manipulation as silver as it is way too big of a market.
However, gold's price is suppressed in other ways. We have a national debt of almost 16 trillion, several rounds of QE and a growing derivatives bubble; yet fewer than 1 in 50 investors have significant money in PMs. Why? IMHO the mainstream investment community, not to mention banking and government officials, have consistently attempted to discredit gold. If an investor is concerned about inflation most advisors will gently push them toward "respectable" inflation hedges like oil, natural gas and agricultural commodities. People who do put assets in gold are labeled "gold bugs," yet I've never heard other investors labeled "oil bugs" or "agri-bugs."
Having said all that, it may not be reasonable to expect to gain a lot of wealth by buying gold. To paraphrase what as already been said, to purchase gold is to invest in cash by other means.