Square\u2019s $29 bln takeover of Aussie fintech darling Afterpay shines a light on the \u201cbuy now, pay later\u201d craze, which poses a big challenge to many established players in the banking and payments businesses, argue Melbourne-based editors Jeff Goldfarb and Antony Currie.\xa0 See acast.com/privacy for privacy and opt-out information.