OP don't even keep or store cryptocurrency in decentralised exchanges or centralised exchange but use self or non custodial wallet to store your coins. But if you want sell at dat time, you can transfer to dem and sell them off and not to keep dem there. Both decentralised and Centralised exchanges are term as, "not your key not your wallet".
You have a point Agbe. Fact is storing your coins on any exchange is a risk. Infact the risk is higher in the case of decentralised exchanges compared to centralised exchanges. The reason is because in a centralised exchange , you would have to do a KYC verification and they are like giving you a guarantee for your coins based on your KYC details. However for a decentralised exchange, you are pretty much anonymous and in that case you are risking your coins in detriment of you not releasing your KYC details.
None of decentralised or centralised exchanges is 100% safe for your funds or you since for both you are either risking your KYC details or your funds.
Your opinions and points are correct. It is not in any way advisable for one to store their their assets on a cex or Dex platform. It is not ideal because these platforms can not guarantee their own safety not to talk of your own assets under their custody.
Decentralised exchange is more risky than centralised because one's coin can be taken without their prior knowledge as it is that they have information as to show their identity and claim ownership of the tokens and if it happens that they are absconding they would make away with the funds since their identity is unknown and likewise their users too. In this situation their is nothing one can do or hold anyone responsible for their lose.
However, centralised exchange still does the same thing but the difference is that centralised exchange demands for KYC because they too are known so they would need to trust your identity first by demanding for KYC which you can be sure that you would keep your funds with them but the truth is that non of them are safe. Any asset that is not under your custody is not your own be it with Dex or cex, the assets does not belong to you because it is not under your custody unless you have them in your private wallet that is when you can say that the coin/token can be yours.
Never have the thought of keeping your funds and assets with third party exchange. Keep them in your personal or self custodial wallet for your own safety.