Ripple-affiliated cryptocurrency XRP has launched a large-scale advertising campaign across the New York City subway system, with its brand identity visible both inside and outside train cars and in subway stations such as 42nd Street. The marketing campaign, themed "Crypto Responsibly," aims to build momentum for Ripple's Swell conference, held in New York this week (October 27-29), and the recent AI and Fintech XRP Ledger Hackathon in the city.