#CryptoCorner: Walmart (NYSE: $WMT) Applies for Libra-like Stablecoin Patent, Mastercard (NYSE: $MA) and Nexo Launch Crypto Credit Card, AWS

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#CryptoCorner: Walmart (NYSE: $WMT) Applies for Libra-like Stablecoin Patent, Mastercard (NYSE: $MA) and Nexo Launch Crypto Credit Card, AWS (NASDAQ: $AMZN) Announces $100K Blockchain Competition and Brave Launches Twitter Tipping Feature