People use bitcoin because of a lot of reasons, the security of bitcoin is a very good reason.Also the anonymousity of bitcoin, pay with bitcoin since it doesn't register to any name or any personal information.
Yes that is the best reason which attract customers to use bitcoin suppose if a person want to buy some credits on a gambling site and he do not want to show his identity then he choose to use bitcoin.
I think for ordinary people anonymity will not provide the functionality or any benefit to them, if you give this explanation on the target ordinary people of course you will not get additional users