“比特币持仓大户”Strategy（MSTR，原名MicroStrategy）计划出售至多21亿美元STRF优先股。

Group 1 - The core point of the article is that MicroStrategy (MSTR) plans to sell up to $2.1 billion in STRF preferred stock [1] Group 2 - The sale of preferred stock is part of MicroStrategy's strategy to manage its Bitcoin holdings and potentially raise capital for further investments [1] - This move indicates the company's ongoing commitment to its Bitcoin investment strategy while seeking to optimize its capital structure [1] - The decision to sell preferred stock may reflect the company's assessment of market conditions and its financial needs [1]