What about silver?

Silver is the indispensible metal. A truly unique element, which is used for so many different applications. If a device has an on/off button, there is a high probability it has got silver.

Silver is one of the best conductors of electricity. It has resistance against corrosion. It is used in electronic wires, switches and printed circuit boards.

Silver is a catalyst for many manufacturing processes and is used in solar panels, medicines, photography, water purification, bearings, brazing, soldering and jewelry.

Moreover, silver is money. It has been valuable for thousands of years.