KuCoin is one of the most popular exchanges for now and is recognized by several crypto communities, because it has an internal security method for operator protection, both through verification by mail, codes for trading and two-factor authentication, where most of its functions are stable in dealing with advantages on the server, which also has a wallet section that makes most cryptocurrency operators offline.
This exchange is also quite convenient and safe for storing and sending crypto, and moreover to do the withdrawal does not require KYC. In my opinion, KuCoin is a very simple and safe transaction.