All we know that bitcoin already hit more than $15000 last 2017 so there is a big possibilities that it may hit more that $15000 again. But no one knows when and how much will bitcoin will increase but the best thing that we need to do is have more patience and invest to hold more bitcoin and wait for the halving and bullrun.
Halving should affect the price of bitcoin. But it is very difficult to guess which way its price will change. There are many supporters that the price will decrease because the miners will stop supporting the network. But I think that the price will slowly rise to the level that is a record for bitcoin.