PayPal Holdings Inc. CEO Dan Schulman said the use of digital currencies is expected to become more widespread as more merchants take a digital first approach to payments. The whole world is going to go digital first, Schulman said at the Web Summit on Wednesday. Stores accept payments via smartphones and QR codes, even in stores, and more and more customers are starting to use digital wallets, which are natural complements to digital currencies . PayPal announced in October that its customers can buy, sell and hold cryptocurrencies, including Bitcoin,…

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