In a compact San Francisco office suite equipped with soldering stations and swipe-testing machines, Coin's team of seven has been working furiously to perfect the final prototype of an unlimited credit card. No, not one that will let you charge with abandon. Rather, a device as slim as a standard piece of payment plastic that can hold countless credit, debit, and gift cards in its dynamic magnetic stripe.
Kanishk Parashar, the CEO and founder of the Y Combinator-backed startup, embodies the effort-worn entrepreneur. "I got to work out today," he said, eyeing the limited set of weights … Read more