[howdydoo]

>efficient LED lighting

This isn't as clear cut as it sounds. The Jevons paradox: as enegry efficiency goes up, enegry demand goes up by more. Or, put another way: humans wasted less electricity 20 years ago with incandescent bulbs than we do now with LEDs. One could also say that LED efficiency is counteracted by tech improvements. But in reality, we may be using more energy, but we're also doing more, and doing things we couldn't have done 20 years ago.

I'm skeptical of assigning a value judgment to things that a lot of people find valuable. LEDs are used for bigger, brighter advertisements. If I don't personally like ads, does that mean energy efficient LEDs are a waste? Bitcoin mining is used to secure a ledger from attackers with the resources of a nation state. If I don't personally care about a secure ledger, does that mean mining is a waste?

And about profitability, this is important, and new within just the past few years: renewable energy is the cheapest energy. [1] Anyone mining with coal is behind the times and will be competed out of the market in due time. The more incentive people have to seek out the cheapest energy, the higher the demand for renewables will be, and the faster the world will get on board. I for one welcome this catalyst.

[1]: https://ourworldindata.org/cheap-renewables-growth