[Most Older Bitcoin Mining Machines Have Reached Shutdown Price] BlockBeats News, June 4: According to Antpool data, under the conditions of Bitcoin's network mining difficulty remaining high and electricity costs calculated at $0.06 per kWh, multiple older models of Bitcoin mining machines have fallen below the shutdown price and entered the loss zone. Models such as Antminer S21, Antminer S3, Whatsminer M63S (360T), and AvalonMiner A1466I series currently have negative daily net profits, nearing shutdown levels. [Original Link]