Apparently, I have some unused credit at my domain registrar and it is enough to buy some domain name that is less than $10 for one year.
Is there any expiration date for that $10 credit in your account?
If not, than I would not create anything quickly that won't be used at all, remember that you would need to pay renewal next year again.
In rear cases good domain name can be sold later for more money but you really need to be lucky with that.