Since the recent news of hack, I had been researching on Custodial and non-custodial exchanges thinking that if funds are safe with me in my wallet I am safe. But, this a completely new thing to me that KYC database has been sold. Now, I think one need to only prefer Non-custodial exchange with no kyc.

I found that the following two Exchanges are Non-custodial as well as NO KYC required.
1. CoinSwitch.co
2. Changelly

It really scares me when I read all such discussions in forum. I have even been using Bitmex which is custodial but, till day did not face any major issue using there site.