Who is the "we all" you speak of? Its certainly not me (I've had far too many frustrating, expensive, time-consuming problems with the legacy banking/financial system), and I have lots of friends and acquaintances who are not at all content with the tyrannical "know your customer" regulations. Banks have been deputized to act as police, and at least in the EU, laws were passed protecting banks that legally allow banks to skim off their clients funds if the banks face serious crises (and that's even discounting what they steal from folks via designing for inflation)---thanks, but no thanks. That's legalized theft!
Beyond that, our mainstream debt-based monetary systems encourage and pressure everyone to spend more than they earn, funded by debt, chasing ever-cheaper consumer goods. This growth at all costs trashes the environment far more that a sound monetary system would.
So, perhaps the wider long-term effects of bitcoin existing as the worlds hardest money yet[0] would be production of higher quality long-term goods rather that cheap environmentally costly debt-funded junk. That possibility is independent of a bitcoin/solar/battery synergy such as suggested in the article's model.
I find the idea that sound money may result in more economically competitive renewable energy fascinating. I wonder if a similar model could apply to other intermittent renewable energy sources?