Decentralized exchanges are more secure.

[rearwheels]

I suppose that full potential of DEX exchanges is not discovered by users yet. I remember my first experience with DEX exchange - that was not easy in comparison with centralised exchanges. It is good feeling that your wallet is under your control only but you have to be patient to learn how to operate on DEX exchange. It's the matter of time for DEX exchanges. The more you have practice with it the the more you become familiar with DEX.

[kaya11]

I have been compromised once in a decentralized one, I nearly lose my 1000 dollars, but luckily I got it back. I can't remember the exact date but it was when someone from etherdelta, they've got issues and the guy pays back compromising accounts of the consumers. On the other hand, in a centralized one, it is almost half a year and some of my alts are in there. In different centralized exchange I never had any issues between them, this is base on my experience, only the fees are bugging me because it's high but the security is good for me.

[fosco333]

In Decentralized exchanges Funds are more secure.Your funds always stay with you.  I think that they are the future of all asset exchange.
 In centralized exchange you've to transfer
 your crypto to exchange if they get hacked
 all users funds are gone. 

Decentralized exchanges are not secure more than centralized one, your coin does not always stay in your wallet.
You will need to transfer it to exchange wallet, for example in forkdelta, you need to deposit your eth to forkdelta eth address.
We must very careful when opening the site of decentralized exchange because phishing danger.
There are no 2fa in DEX, once you have been phished, it will be over.