I had a lot of unicoins, but i left them unattended and my dog ate most of them. I wonder if SE would accept a dog full of unicoins as a payment.
I have heard that if you change your avatar to your personal unicorn your unicoins will be protected!
Go to http://unicornify.appspot.com/use-it fast and change your avatar to be safe!
It works for me so it should work for you to!
EDIT: I just found out how the unicorn protects the unicoins, it used its custom laser eyes to kill the thiefs. It looks something like this: