Well, there already has established privacy coins like Monero, DeepOnion, PIVX. Anyway, Veil is also a good privacy if they are saying everything as it will work.
Privacy is very much needed because we need to stay away from people who want to trace us.
Offtopic-
Are you really trying to have a discussion or shilling veil here?
Then if we are using bitcoin to transact, we can still use it but with the support of a mixer does it? but maybe using privacy coin is much more efficient to use compared to paying transaction fees from bitcoin mixers and websites that is in accordance with it in the market. I want to know, what is "shilling veil" means?