Public Keys is a weekly roundup from Decrypt that tracks the key publicly traded crypto companies. In this week's roundup, we've got the latest on CME, Walmart's crypto play (for real this time), and Robinhood flying high: All-time highs for HOOD Stock and crypto trading app Robinhood saw a new all-time high this week on reports that it’ll extend its prediction market offerings outside of the United States. Reports surfaced this week that the company has been speaking with the U.K.’s Financial Conduct a ...