We are going to have ICE's for a long time.
Mindless bans like that, if overzealous, will just push even more of industry to Asia/China, where most of pollution happens today anyway.
I wouldn't be surprised if China funds quite a few green causes, big boost for their industries, and they get to just ignore all emissions rules.
This has lead to things like [1] where it is significantly more economical for long-haulers to electrify their existing fleet than continue using diesel fuel. I suspect long-haul will reach 90% electrification long before last-mile trucking and private-use automotives.
That said, I imagine you are spot on regarding farming - and pushing industry to less restrictive jurisdictions.
[1]: https://www.theguardian.com/australia-news/2021/apr/29/swap-...
All the electricity gets mixed together in the power network anyway, so if you buy 'renewable' electricity you are effectively just paying a premium to say yours came from the pool of renewable electricity. If you increase the power load on the network though, and in-aggregate the power requirement increases, chances are that increase still comes from fossil fuels.
I think we will be waiting a long time until global electricity is 100% renewable, although I hope it happens quick and it's good that you are more optimistic than me :)
It doesn't matter if bitcoin mining specifically uses renewable energy. What matters is used in total by everyone. And bitcoin mining will always make things worse, no matter what kind of energy it uses.