I wish they made those tiny little round white stickers they have inside Apple products out of gold [1]. They keep getting wet and voiding my warranty.
I'm not sure if sarcasm or not, but that's the point. If they got wet enough to 'trip', then enlighten damage could have been done to internal components to void your warranty anyway.
Gold, silver or copper are used in electronic devices as a conductor. Your device should have one as well, whether in gold or silver, depends on the makers. But the quantity of the metal used might not be as much as you are thinking.