There are lots of good exchanges out there, but my preferred choice would always be binance, my reason for choosing it because of it's security and also It has very high trading volume. It is really a good one,that is the exchange I fill secure about.
And what do you say about the recent hackers hacking this stock exchange? 7000 Bitcoin stolen And this is not a small amount of funds that users have lost. Thus, the binance trading exchange cannot be called safe.