(Bloomberg) -- Klarna Bank AB Chief Executive Officer Sebastian Siemiatkowski said the firm, known for its buy now, pay later offerings, is exploring an expansion into the cryptocurrency market.Most Read from BloombergCan Portland Turn a Corner?Why American Mobility Ground to a HaltSaudi Arabia’s Neom Signs $5 Billion Deal for AI Data CenterSpaceX Bid to Turn Texas Starbase Into City Is Set for Vote in MayCutting Arena Subsidies Can Help Cover Tax Cuts, Think Tank SaysAfter previously dismissing