I've only used a few of them and so far I haven't gotten any problems with any of the following exchanges : Hitbtc, Yobit, IDEX and Kucoin. The cases reported on the exchanges is on 1:10000 ratio and we should not think that the same thing will happen to us. We should be cautious but we shouldn't be afraid to try different exchanges. Reported incidents are like rare disease, it will only happen to a few people not to all of us.