Define the terms.
They are vague, and by their usual meanings, not mutually exclusive.
I'd assume you mean predictable vs unpredictable, but people's definitions vary a lot on these terms.
Again, if my assumption is true, I'd assume you mean from a human point of view. I can't imagine unpredictability as an actual property of an object, merely a property of the would be "predictor".
The Universe is unpredictable, to a certain degree, and from a human POV, for the following reasons:-
Classical Physics: Where all particles inact a force on all other particles. Humans are part of the entire universe at any given moment. In order to predict the universe, they need to predict themselves, as they are part of the universe. They in turn would be affected by the prediction they make, so in order to predict themselves, in order to predict the universe, they would need to predict the prediction. Ad Infinitum. Perfect predictions are the product of guesswork.
Quantum Mechanics: The behaviour of Sub-Atomic "entities", appears unpredictable in nature. Bell's Theorem is a decent mathematical proof that some of this behaviour will always remain unpredictable to us.
But, with unpredictability comes predictability. As multiple objects behaving randomly start to become more predictable the more objects there are. Same as how one dice roll (if a dice roll were actually random) is unpredictable, but one million dice rolls has a much larger degree of certainty to it. (1d6 is 1 in 6 odds for each number, for 2d6, 7 becomes more likely than the other numbers, because more roll combinations produce it)
The behaviour of googel's of particles, becomes as predictable as the universe around us is.
There's a lot of complexity revolving around Epistemology, if I guessed your meanings correctly. Even Philosphy of Mind steps into the ring (it always does, to be fair).