OP takes a silly stance, but it would take a hell of a lot of bitcoin mining to destroy the biosphere!
The modern capitalist civilization we've built is actually extremely fragile precisely because it has optimized so carefully for the current circumstances, throwing away safety measures, buffers, and redundancies as inefficient wastes of money. So if, for instance, the droughts in California continue to worsen, we may see a huge chunk of the almond industry literally dry up and blow away. And you might not care about almonds specifically, but it's just one more warning sign that the whole system is running close to its limits, and more and more parts of it are going to start to fail if we don't show some damn responsibility and stop wasting, just as a for instance, hundreds of terawatt-hours every year on something whose sole practical purpose is to enrich a bunch of Silicon Valley tech bros.
This describes many companies, also.
Taxing externalities like carbon, microplastics, topsoil erosion is probably the most efficient way forward.
Bitcoin is really neat but probably isn’t saving a single frog or leaf anytime soon.
It’s worth noting that cryptocurrency might in principle be able to help a lot of people who are locked out of the financial system to transact and take part in the online economy. This includes many/most people in the third world. This has nothing to do with hodling though.