How do you even define "debunked" here? It's a subjective conclusion as to whether the immense energy costs are justified by the net value added to society.

Personally, I'd tend towards air travel being a net positive, while Bitcoin is well into the negative.

Nothing on the planet has anywhere near the same ratio of criminality to utility, or planetary destructiveness to utility that bitcoin has. It is way, WAY off the charts. It is unimaginably bad.