Why do you need so much information about me and my money?

To legally open accounts in your name, lots of information is needed.  This is a requirement imposed by the government to help combat the financing of terrorism and money laundering. 

Using DCM you provide this information once and we then deal with the process of opening the various accounts in which your money is invested.  If you try to manage the money yourself, you will have to provide this information (or a variation of it) each time you open a new account.