Banking as a service is expensive, it takes time and onboarding has to be done carefully, says the founder of Bancorp Bank, who now runs a venture capital firm that invests in fintechs. 

Cloud-based tech giants like Amazon, Google and Uber are changing the economy, and not for the better, asserts Yanis Varoufakis, a former finance minister of Greece and a professor at the University of Athens, who has written a book about the dangers of what he calls the "cloudalists."