To me there are only two possibilities for the existence that we all know.
The first possibility is that there is some intelligent design to this universe.
The only other alternative is that the universe magically created itself out of nothing.
The magic theory is so absurd that the first possibility is much more logical.
I'll go with God.
Certainly true. The origin of our universe is taught by some to have come from nothing and without a cause - some scientists have blind faith in this teaching.
The simple truth is that the origin of our universe did not violate the law of conservation of matter and energy (E=Mc^2) nor did it violate the principle of cause and effect.
The Divine Name Jehovah (YHWH) contains a Hebrew verb for "to be" which, in a causative sense, is defined as "He causes to be."
Thus the Bible settles the question as to whether there were an infinite past cause and effects or whether there was a first cause.
Jehovah is the First Cause.
Thankfully, God is love (1 John 4:8).