The Ethereum blockchain, which supports billions of dollars of trading in games, tokens, art and the ether currency, has cleaned up its act. But there are complications
The business model of crypto miners who used vast power-guzzling computer rigs to compete with each other to solve complex equations, and win the prize of adding entries to the blockchain and generate coins was wiped out overnight by the Ethereum software upgrade called the 'Merge'. Image: Natalie Behring/Getty Images