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 there is no urgency to use bitcoin that we get anonymity, unless you're a criminal? surely you will be interested in it? but certainly many people will not be interested if the excess bitcoin only anonymity right, you must have other reasons like has a low fee or transaction speed is very fast, and so forth