Bitcoin may be straddling 30k, but Ethereum (ETH) hodlers have other worries on their minds with the Shanghai hard fork upgrade due to take place in the latter hours of this evening (Wednesday, April 12 for retrospective readers). While hype and anticipation for Shanghai, which is expected to go live at epoch 194,048 on the Ethereum blockchain, or just before 10.30pm UTC (11.30pm BST/8.