Problem is energy from the grid is just energy. You’d get crypto companies buying “green” energy leaving the dirty enegery for everyone else. It’d be meaningless.

Ultimately crypto mining is a pointless industry. It benefits the miners financially but doesn’t produce anything meaningful, while expending huge amounts of energy and polluting the world as a result. It’s also an extremely energy wasteful way to run the infrastructure needed to maintain crypto currencies.

It wouldn’t matter if we were in some Nuclear fusion powered utopia with an abundance of energy. But we’re not - we’re in the middle of a climate crisis and desperately trying to move over to green energy. Growing demands for energy for crypto is countering that.

The real solution is to tax crypto! - for example tax then on every kWh they use. Regions that entice crypto operations in are chasing fools gold - the costs out weight any local economic benefits of new data centres being built.