The world’s most valuable digital bank, Brazil’s Nubank, is launching its Nu credit card in Mexico; the card is available to all Mexicans over the age of 18 and already has a waiting list of more than 30,000; right now only 10 percent of Mexican adults own a credit card and more than 36 million people are unbanked; Nubank has built a business by word of mouth with CEO David Vélez saying the company has spent $0 on customer acquisition; Vélez believes Mexico is ripe for digital banking disruption and that there is room for many players to take hold amongst consumers. Tech Crunch