I actually measured the energy usage with a Kill-A-Watt with and without mining a few months after that post, and I was getting 160 BTC/kWh. Because the cost of mining 1 BTC was less than a tenth of what 1 BTC was actually priced at at the time, I thought that BTC was substantially overpriced, and so I also have the honor of selling BTC at the lowest prices ever recorded, $0.003/BTC.

I think we need to think the other way around. Instead of regretting not being able to send a message to our young self from ten years ago, we should consider what our old self would want to share with us ten years into the future. We might hear our messages from the future if we concentrate enough. Are you guys hearing anything?