Seattle-based crypto exchange Bittrex has signed a banking agreement that will allow corporate investors to trade selected cryptocurrencies for fiat, Bloomberg reports today, May 31. Bittrex, which supports over 200 cryptocurrencies and reportedly has over 3 mln customers worldwide, will cooperate with New-York based Signature Bank to launch fiat trading for Bitcoin(BTC), Tether and TrueUSD. Speaking of the new banking deal, Bittrex CEO Bill Shihara is quoted as saying that the process “had been a long path”: “They really do look and pore through the entire business.