I followed a hobbyist around the yard here a few years back. I showed him where the long-gone outbuildings were. He found two or three rusty old pieces of debris. Of course, I don’t descend from the Rockefellers, either. :^)
When I was using a detector years ago, I was surprised that gold gives almost the same reading as a US nickel and other trash items like pull tabs. I thought precious metals would give a higher signal. You have to learn how to listen closely to the signal and set the discrimination of trash targets so you don’t miss gold objects.