Now, comes the modern era of quantum mechanics. There are experiments in which the effect occurs before the cause. (http://science.slashdot.org/story/12/04/24/2031211/quantum-experiment-shows-effect-before-cause)
That means, things could occur whose causes follows its effects ! So the light bulb glowing on could be followed by me turning the switch on. So we might think that the glowing on of the bulb cause me to switch it on. Or the answer was told before the question was asked! But thats not how we should think.
So how does all this affect a common man like you or me. Well, we have to think differently now. We have to stop categorising things as cause and effect. There are no more causes and effects. There are only effects that happen. The sequence of how it happens is irrelevant.
That being said, i would ask you a question. So what is Big Bang! Is it the cause of why we are here and everything else is expanding. What is the future - is it the Big Crunch or will we just dissolve into the expanding emptiness??
Since now, we no more have causes and effects, big bang is just another effect that occurs. It being a cause is irrelevant. That means our future being the effect of big bang is irrelevant. That means, that our future could, as well, be the cause and big bang could be the effect. That means, we could as well be moving toward Big Bang!