Bitcoin mining difficulty has decreased by 11.6%, marking the sharpest decline since China's 2021 crypto ban. This adjustment reflects changes in the network's computational power and is expected to rise by 5.63% in the next adjustment on February 20. The fluctuation in mining difficulty is a key indicator of the network's health and miner activity. In other news, Vietnam is set to introduce a new tax framework for cryptocurrencies, treating them similarly to stocks. The draft includes a 0.1% trading levy and a 20% corporate income tax on institutional crypto earnings. This move aims to regulate the growing crypto market in the country. Additionally, Ethereum co-founder Vitalik Buterin has sold 2,961.5 ETH, valued at $6.6 million, over three days. The sales were conducted through small CoW Protocol swaps to minimize market impact, following his prior announcement of planned withdrawals.