When's the last time you visited the bank?Thomas Caldwell With so much banking happening online now, some banks don't even have physical locations anymore. And that's not just happening in the U.S. — Mexico has become fertile ground for purely digital banks, known as neobanks.

Many adults in Mexico don't have any kind of bank account, and a lot of those people are young and tech savvy. Fintech startups see this as their window of opportunity to leapfrog over in-person analog banking and get people to start online banking.

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