After five consecutive increases, the Bitcoin mining difficulty dropped by 0.38% on February 25, and is estimated to decrease by another 0.91% in 13 days when the next adjustment is set to happen, according to the estimates by major Bitcoin mining pool BTC.com. In total, the mining difficulty increased by around 12% this year. Last time it corrected lower was on December 5, when it dropped 0.74%.

Source: BTC.com