The Ethereum network's overall hash rate dropped from 610,832 GH/s to 505,770 GH/s within a month. It tells us that miners are no longer willing or able to mine the cryptocurrency. This could likely be due to the Chinese government's crackdown on cryptocurrency mining operations within its borders.
https://www.notebookcheck.net/Ethereum-network-s-overall-processing-power-plummets-by-17-Chinese-government-s-anti-cryptocurrency-measure-likely-to-blame.549204.0.html