The Bitcoin Reserve is a strategic accumulation of Bitcoin (BTC) by a government, institution, or corporation as part of its financial reserves. This section surveys corporate, strategic, and sovereign use of Bitcoin as treasury holdings. It covers firm announcements, such as companies adding BTC to treasuries, strategic reverse proposals, legislative efforts, and market responses. Readers can explore how entities, from public companies to governments, are treating Bitcoin as a store of value, financial safeguard, or strategic asset.