Now I want to know which decentralized trading platform is better than Cryptocurrency trading platform or decentralized trading platform, which means which centralized and decentralized trading platform can be more secure.
In Decentralized exchange(DEX) we consider it is safe and more secure, the same as Centralized exchange(CEX) but in CEX it varies on the reputation they had. Reputable CEX is considered as safe as of now but doesn't store your fund for a long term purpose.
But the difference is the liquidity in both of them, it means volume the chances you will earn profit and that is the difference between CEX and DEX.
Here is the thread that explain your the difference between the DEX and the CEX and you can choose which exchange better for you.
List of Decentralized/Centralized Exchanges