Think this way, if some conditions are created, you'll get a result.
If you repeat the same conditions, the same result will happen, so if there's a big crunch, it will create another big bang, since that big bang is made from the same energy again, the result will be the same (supposing that nothing will interfir with the big bang and change something in it).

So it means that the univers will start over again, and everything will going to repeat again, we'll born again, and we'll live that life like it was the 1st time.