I don't believe that DEXs are safer from CEXs in terms of security breaches. I love DEXs since they don't have KYC and AML, but are slow in terms of trading since there are not many people using them. Even if CEXs have issues and checks of all kinds, people will not easily start trading on DEXs.
The fact is that on true decentralized exchanges, you can decide to use the address that you generate on your own noncustodial wallet to receive the coins
, or you. You can generate seeds phrase, private key and the address on the exchange but yet you can
decide receive the coins at any noncustodial wallet
ifaddress of your choice.
For derivative trading, I do not think there can be a decentralized exchange for it. Those that called themselves decentralized like this one are not actually decentralized but centralized.