Crypto’s energy conundrum

In a financial world of stocks, bonds, foreign exchange, and credit cards, trillions of dollars are traded daily, with money flows handled by a bevy of databanks. In the world of cryptocurrency, billions of dollars worth of Bitcoin are traded through as many as 400,000 transactions per day, consuming the energy supply of a modernized country. The quirk is a “proof of work” feature that provides decentralized security. Is Bitcoin’s energy usage all for nothing, or is it a game-changer for renewable assets and generators? Tristan Rayner explores.