I mean, in theory someone who owns a big part of a resource distribution system with a high potential waste factor could start a side business that makes use of that resource when it's about to 'spoil'. Be that a condiment factory or BTC mining next to your cubes of lithium.

Building battery backup near solar farms and then burning the surplus as BTC mining whenever the batteries get full but it's a windy, sunny day would reduce the footprint of BTC a bit. But like the rest of the grid, those happy stories are built on a bed of lies/coal/natural gas. You can change the ratios all you want but at the end of the day those don't shrink the bad parts very much, and dilution is not the solution.

Also, the sad fact is that as much as I wish it were different, having hardware sitting idle is super expensive, both financially and embodied cost. Mining hardware and the buildings to store them have a carbon - and water - footprint even when they are off.