I think allot of people do not really understand gold investing. They assume it is "just like any other investment choice, which is wrong.
People in general operate over a relatively short time horizon. In the grand scheme of things, our perspective is naturally limited. We assume that society will be the same as the future as in the past, because most times, this is a useful asumption.
Why invest a bit in things like gold and silver?
Weimar Republic: A civilized, advanced nation. Who expected what ended up happening? If you had predicted it, you would have been considered "crazy".
A fiat currency colapse is possible. That is the reality. We hope it does not happen, yet it has happened in the past, and it will happen again in the future.
Regardless of if you believe in the truth of bible stories, the story of Noah's arch is a very useful metaphor. They laughed when Noah prepared for the flood... yet when the flood came, those that laughed perished, Noah was fine.
Now, is gold and silver investment the ONLY thing one should have a bit of to prepair for possible hard times? Of course not. However, it is a globally held commodity that can be readily and easily traded. Other good items are Bullets, a emergency food supply, etc. Just a bit of wealth in these items is a very good idea. Most people are so blindly arrogant they just laugh. Well, a dirty bomb is possible in a major city, or a biological attack. THe government has already set up procedures to quarantine entire areas in case of emergency. Urban dweller: IF this was to happen, would you starve? would you be dependant on FEMA (laugh, laugh).
I guess i know a bit about this because I have relatives who live in a so-called "developing" nation. To them, gold and silver is a necessity similar to having overseas bank accounts. Having items you can "grab and run with" will make it easier if disaster does strike. Don't fool yourself. If it does not happen in our lifetime, at least you can be prepared. You can teach your children and thus maximize the odds your progeny will be among those who survive.
Now if you want to speculate on changing prices, well, gold, not gold, who cares just a trading decision. That is NOT the reason to old physical gold, however.