It's one of the biggest successes in the fintech sector. MobilePay in Denmark, Venmo, Cash, Paypal in the US most of the use debit card/bank accounts. One of

It's one of the biggest successes in the fintech sector. MobilePay in Denmark, Venmo, Cash, Paypal in the US most of the use debit card/bank accounts. One of the problems turning it into a business though is that the Durbin Amendment and national legislation have reduced the interchange fees so that it's hard/illegal to charge for use of the card. But it's a booming business that only just started.