Saw this video about gold, it’s chemical structure and malleability. I still don’t understand why gold is worth anything at all……
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Gold is **massively** useful in electronics – if you want a reliable connector the pins are going to be gold plated.
It’s also great to stop other contacts from corroding, and at conducting heat (I’ve seen gold-plated aluminium heat sinks in high end stuff).
ENIG (Electroless Nickel Immersion Gold as /u/naaarff points out) is a very common finish on circuit boards.
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