If it has a cause, it is dependent. And you have the turtles problem again, you've left the argument, or rather validated the reasoning for an uncaused first cause.
I'm sticking within the first cause argument restriction here, irrespective of what you call it. If you take it to more religious area, then you can discuss God's motivation.
It doesn't matter.
Assuming your first cause argument to be true, our existence is proof that creation did take place, that the first cause was caused to act, to change, and that in doing so lost its timlessness and underwent self-destruction.