This is great to hear that it is coming soon. I was hoping for something like this for a long time.
A format like Shapeshift would work wonderful for doing exchanges,
BUT
have you also considered adding an 'advanced' interface that could be like binance for investing or an MT4 interface (or even linking to tradingview to trade with their charts) to bring it up to be a professional investment trading platform once you have completed this major addition to steem?