Bitcoin’s mining difficulty, which determines how challenging it is for miners to solve the cryptographic puzzle required to mine new blocks, is poised to see its largest drop ever in an upcoming adjustment.
Multiple on-chain data sites estimate that Bitcoin’s mining difficulty will see a plunge of around 21% in its upcoming adjustment that is set to happen at the block height 689,472, or due in about five days from press time. That would be the largest difficulty drop ever in Bitcoin’s history and will also be the first time that the network records difficulty drops for three times in a row since December 2018. The difficulty measure went down by 16% and by 5% on May 30 and June 14, respectively. 
Bitcoin’s mining difficulty is designed to adjust itself every 2016 blocks based on the total hash rate racing on the network throughout the 2016 blocks. The average hashing power securing the world’s largest blockchain by market capitalization has dropped from 142 exahashes per second (E

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