Most of the gold’s price comes from it being used in jewelry and as an investment. Less than 7% of gold is used by the tech industry

https://www.statista.com/statistics/299609/gold-demand-by-industry-sector-share/

Kidneys rock! As long as they don’t stone, that is.

If you have a home office or someone is at home 24/7, then yes. Otherwise it would make sense to reduce the heating/cooling of the house when no one is home and setting the correct temp again when people are about to get back. Saves quite a few bucks.