Michael Saylor, the founder of Strategy, plans to raise up to $21 billion in preferred stock to expand the company's Bitcoin holdings.Saylor's proposal for a Strategic Bitcoin Reserve could reshape national treasury strategies and strengthen Bitcoin's strategic importance.Through the issuance of preferred stock, Strategy aims to raise capital for general corporate purposes, including acquiring more Bitcoin.Saylor's vision for a national Bitcoin reserve highlights a shift in U.S. policy towards embracing digital assets for economic purposes.