2011/12~ ish my wife said "we should build a computer to mine crypto" my answer was "that is dumb, how can some digital ones and zeros be worth any actual cash, it seems like a waste of money to spend thousands on a computer with multiple gpus for something that will never pay for itself."
A couple weeks later I regretted my answer because I could have had a SICK gaming computer. A decade later I regretted it for other reasons and decided to start letting my wife make all the financial decisions.