In the crypto world things like halving always cause a big price increase, but the problem comes after the halving that price goes back down a lot. If we look at the past scenario and the current one realizes that today there are many people who are buying bitcoin, then it is possible that the impact of this halving is greater than the impact of the past halving.
We can just only hope but we can't expect that bitcoins price movement will be the same as last 2016 halving. The situation back then is really different from now, and there are many factors that are needed to be considered right now before we speculate that bitcoins price will double or even pump during next year's halving.
We recently saw the price go from $7400 to over $9500 in a few days (I think it was in two days). That's why I believe the price can easily double.