All the such energy/BTC arguments miss that BTC (and other crypto) mining in space has no limit and will become feasible when Starships start flying. And it looks to be more profitable than asteroid mining :)
People frequently raise the issue of cooling in space while missing the fact that at 60C 1m2 radiates away 700w - enough to cool 3-4 mining GPUs which can basically be just slapped on that heatsink.