Even using the electricity to literally just pump water uphill would be a better use than to pump it into the blorkchain:
https://en.wikipedia.org/wiki/Pumped-storage_hydroelectricit...
And if the world is looking for something to do with surplus electricity:
https://en.wikipedia.org/wiki/Desalination#Energy_consumptio...
Considering the fact that 1/10th of the worlds population have no access to safe drinking water, this would be a far better use ;-)