A Square-powered bitcoin checkout is now live on the Vegas Strip, where Bitcoin 2025 attendees can scan and pay for merch in seconds using the Lightning Network.Miles SuterLAS VEGAS — Jack Dorsey's latest bitcoin vision is hitting the checkout counter — starting with a merch truck parked just off the casino floor inside The Venetian.This week at Bitcoin 2025, Square is piloting real-time bitcoin payments, letting attendees scan and spend crypto for T-shirts, hoodies, and hats at the BTC Inc. pop...