Strategy's Bitcoin Buying Accelerates as $48 Billion BTC Stash Sits Underwater

Clarify details before publishing: confirm the entity name (MicroStrategy / ticker MSTR or another firm called 'Strategy'); provide the exact size of the fourth-largest Bitcoin purchase (BTC amount and/or USD value) and the date it was executed; confirm what '$48 billion BTC stash sits underwater' refers to (current market value, cost basis, or amount underwater) and the date of that valuation; confirm whether to include the timing/detail of Michael Saylor's defense (date when it 'became a meme').