20VC: OpenAI Cuts Valuation to $1.25TRN | Public Market Meltdown: GOOG Loses $500BN in 12 Hours | DoorDash Buys Instacart for $17BN | Kalshi Raises $1BN and Cognition Eyes $80BN Valuation — The Twenty Minute VC (20VC): Venture Capital | Startup Funding | The Pitch Podcast Summary | Retyped