We ingest trace quantities, like zinc offer benefits. But I am wary of it.

I was a stupid little shit of a kid. I had a goldfish, it survived my cat, my cat knocked over my goldfish bowl and the little fish was on the floor for hours and hours. It didn't survive me putting copper in its fishbowl. I put a few copper coins into it to give it more colour, and it died a few days later. The copper went green immediately. I was so sick and sad for the poor fish. It survived the damn cat, out of the bowl on the ground for hours. But my stupidity, innocent of course, was fatal.

I am wary of copper. It has concerns. Yes it is a supplement in trace quantities, we ingest it in our water. There are copper supplements, like zinc. You could even beat the breathalyser test by copper oxide.

But that fish, it was poisoning. Read the link on its mining.