Bitcoin

Crypto mining's energy consumption remains a regulatory and reputational risk. Innovations like sand batteries that enable low-cost, long-duration thermal storage can make renewable-powered mining more viable, potentially reducing operational costs for miners in cold climates. This fits into a larger trend of energy decentralization and grid resilience, which aligns with crypto's ethos but has limited near-term market impact.

A sand battery in Pornainen, Finland, can keep the town warm for up to a week in winter.