The point of a CEX (Centralized Exchange) having dormant money in deposit is to provide a safe and secure place for users to store their funds. This allows users to have peace of mind knowing that their money is secure and protected from any potential threats. By having the funds stored in a CEX, users can also benefit from the added security measures that the exchange provides, such as encryption, two-factor authentication, and other security protocols. Additionally, having the funds stored in a CEX also allows users to access their funds quickly and easily, as they don't have to worry about transferring the funds from one place to another. This makes it easier for users to make transactions and take advantage of market opportunities.