MONEY MAY not go as far as it used to, but there are more ways than ever to spend it. While checking out at your corner drugstore, it’s now quicker to flash your smartphone at the payment screen than hunt for change or hope your chip card works this time. (And forget about writing one of those primitive things called checks.)
Source: https://www.wsj.com/articles/the-new-rules-of-conduct-in-a-world-without-cash-11558635593?mod=e2tw
Landmark Financial Seoul Korea Blog 