The World Bank estimated this at 1.7 billion adults in 2017. Will a currency backed by facebook fill that gap?

The World Bank estimated this at 1.7 billion adults in 2017. Will a currency backed by facebook fill that gap? How many of the 1.7 bn people who dont have bank accounts have smartphones/facebook accounts?
moneyinsideout.exantedata.com/p/is-it-to-be-… https://t.co/8mVXH9s0QY

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