As to the above, I'd bet if you're talking about the United States it'd be the former (higher taxes for miners), especially given how much electricity is used. The only way I could see anything being subsidized would be if a mining operation were to use green methods in their farming, e.g., solar or wind. I haven't got a great sense of how the US government views bitcoin--there's nowhere near the amount of regulation I figured there would be at this point, but there's not exactly a lot of support for it on the federal or state level <snip>
Most if not all large scale mining in the USA already IS using 'green energy'. AFAIK the vast majority are using hydroelectric followed by wind. For hydro users in the Northwest the reason is simple: Due to several large river systems emptying into the Pacific ocean there are several very large dams located there so the power is cheap (and 'green').
You want subsidies? If you are in the US then you need to checkout Section179.org to see the rather massive credits a business can get for buying the hardware. While Section 179 of the US tax code applies to all small/medium-size businesses purchasing equipment it seems that a lot folks do not think of it applying to miners. If you are a mining business it DOES.
Section 179 at a Glance for 2021
2021 Deduction Limit = $1,050,000
2021 Spending Cap on equipment purchases = $2,620,000
Bonus Depreciation: 100% for 2021