For example, the centralized trading platform is Binance, Kucoin
And decentralized trading platforms are Nash, Ether Delta, Binance DEX, Idex
which means which centralized and decentralized trading platform can be more secure.
if you ask a secure platform all the platforms you mention are safe and the KYC process.
Now you can make your choice to use it, Binance, Bittrex, Poloniex, and Kucoin, all of these platforms are used by members here, now it's your turn to choose, everything is safe.
You have the freedom to use it.