After reaching a historical high, the Bitcoin mining difficulty has slightly decreased. Some listed mining companies, such as MARA and CleanSpark, have chosen to increase production and accumulate BTC. MARA mined 950 BTC in May, bringing its total reserves to 49,179 BTC; CleanSpark mined 694 BTC, increasing its reserves to 12,502 BTC. The trend of using BTC as a company reserve asset reflects a strategic shift for mining companies from selling Bitcoin to long-term holding, despite significant increases in mining costs and profit pressures after the halving.