I consider Copper to be a Precious Metal and definitely worthy of inclusion in anybody's stack. Historically, for many centuries Copper has been a Monetary Metal like Silver and Gold and until recently was included in coins or bars circulating as currency around the world. However Copper is not as shiny or valuable as Silver and Gold so it’s easy to forget it’s importance as a Precious Metal and it's historical role as money.

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Copper has a lot of industrial uses so (like Silver) it can boom just from industrial demand while other Precious Metals do nothing, so I like to use Copper as a comparison to Silver to try to understand better where the demand for these Precious Metals is coming from. At the risk of boring you with charts, have a quick look at these two below :-

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This is Copper over the last 12 months. Pretty impressive rally from about March this year. If you’re HODLing Copper at the moment you’d have to be happy.…

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Now check out Silver over the same period. It's an almost identical chart with sideways action until March and then a rally of some 30%.
So what does this tell us? Copper and Silver are moving almost in tandem, which suggests to me that the recent rally in both these metals is less about Safe Haven and Monetary Metal demand and more about Inflation and Commodity demand. I would even go so far as to say that these charts are telling us to expect Rate Cuts and More Inflation ahead.
Regardless, if you’re getting started and stacking for value then there may not be a lot of difference between stacking Silver and Copper. As a cheap and very accessible Precious Metal I think Copper is a great choice for new stackers on a budget. During good times and bad there will always be demand for Copper so stacking Copper is possibly one of the safest investments you could make.