I expect nothing much until 2021 myself but I'm more than willing to be surprised.
I'm also thinking the same thing, I've seen the other halving and didn't do much after it but the next year was a boom. It's no longer surprising if it will reach that price range given by op. It can double the last all-time high but expect that there will be a follow-up drop.
I expect that the price will hold about where it is now until about 3 months before the halving. At that point it will probably gradually increase to double the price by the halving. This is approximately what happened in 2016.
Yes, that's what happened and the positive effect took place by the next year so probably by 2021.