Bitcoin mining difficulty hits all-time high as BTC miner selling peaks By Cointelegraph

mining difficulty reached an all-time high of 53.91 trillion units after the latest difficulty adjustment on July 12. It is a measure of how difficult it is to mine Bitcoin (BTC) blocks.

The blockchain adjusts its difficulty every two weeks to maintain its processing time of 10 minutes. When the network’s processing power increases, it adjusts to make mining challenging, reducing the profitability for individual miners.