I'm already familiar with coinbase and Gdax but they only cover four coins at the moment.
What is a good exchange where I could buy and sell alt coins like Ripple, Dash, Monero, and Cardano?
Ideally, the fees will be zero or very low. Obviously I want something secure as well.
many good and trusted exchange out there and popular like bittrex ,poloniex, binance and many more but not too popular. I currently use binance and kucoin I think both easy to use especially for beginner.