Please provide more information.   Creating a new account and coming on here to talk negatively about random bit coin service seems like a common trend these days , maybe trolls, maybe competitor, maybe valid complaints.

But please give more information on how this could have happened and people on here can provide future advice for you or if it was a probably with coinbase people will know to be more careful.  Typically a theft like this is going to be a user error, not a problem with coinbase itself.