1. Yes I do.
2. I keep an eye on serum copper and it's been my experience that fears of copper toxicity, as with vitamin a, are way overblown.
3. I prefer bio copper (cunermuspin) and iron (heme); I think they are far safer than elemental supplements and more bioavailable, too.
Side note: pathogenic infections often hijack or tax our copper supply; folks are greying in their 30s or 40s now. That shouldn't happen.