I made a lot of money betting on silver earlier this year, but realistically, I think precious metals is a bad bet right now. I could give you a bunch of reasons why , but the underlying concept is, you can't say something is a good investment in a vacuum, you have to consider what it's currently trading at. Do I think Amazon stock is a good value @ $200? sure, but unfortunately it's up around 225 now, which makes it less attractive to me. Same with gold/silver. I was buying up gold and gold derivative paper stocks earlier when gold was priced at $1220/troy ounce, but not at ~$1600, I think the value is already priced in there, so I'm now on the bear/negative side of it as a current investment. You can't say something is a "good investment" without considering what it would currently cost you to get into.
Silver is more problematic to me, it's taken quite a fall in the last month, and its historical ratio to gold's value still leaves some room for upside, but I think most of the money that could be made going bullish on silver has already been made since it was trading down around $25/oz. Just my .02 cents, and I was really bullish on silver earlier this year, but the bull run is probably mostly complete now.
Cliff notes = Don't buy precious metals right now, they've had quite the run-up recently, and they are going to get hammered at the first hint of this debt ceiling issue being worked out, plus myriad other systemic risks to further gains in value.