Any of you have a facial recently where they use a new metal “roller” which puts a metallic taste in your mouth? Strange as that was (because it’s not near your mouth) it’s more than a week later,and I still taste that metallic whatever-it-is!
It’s possible that this roller has brought the iron in your blood closer to the surface of your skin and thus causes that taste.
You know that smell coins have? The smell is really only emanating from your fingers. If you picked up the coins with a glove, there would be no smell.