This is its highest positive difficulty adjustment since January 2018 when the mining industry was reeling from the speculative bull run that happened in late 2017.
Back then, there were two back-to-back jumps of 15.36 percent and 16.84 percent that took place on Jan. 13 and Jan. 25, respectively.
Miners flock back to the Bitcoin network
The difficulty shows how challenging it is for miners is to produce new BTC. It adjusts after every 2016th mined block to reflect the state of the network.
After the miner reward dropped from 12.5 BTC to 6.25 BTC, Bitcoin’s hashrate, which measures the compulsive power of the network, shed 26 percent.
Some industry players had to switch off their rigs after the pre-programmed event cut their profits in half.
As a result, this exodus of miners was followed by two negative difficulty adjustment on May 20 (-6 percent) and June 4 (-9.29 percent).
Bitcoin’s hashrate is likely to decline
The latest 15 percent increase was expected due to rapidly growing hashrate, which climbed to 117.5 EH/s on June 12.
This huge adjustment is likely to weed out miners with smaller computational resources that are no longer capable of breaking even. Consequently, the network’s hashrate is likely to decrease in the coming weeks.
Thomas Heller, global business director at F2Pool, some Bitcoin hashrate will migrate to competing forks (Bitcoin Cash and Bitcoin SV) since they currently offer higher revenue per TH.