nobody knows. A logical short term development could lead to a 50% reduction of BTC.
Today: 1 BTC ~ 2600 USD and BCH = 0 USD
After HF: 1 BTC ~1300 USD and BCH ~1300 USD
Mid/ Longterm I believe we will see something similar to ETH and ETC.
2018: 1 BTC ~ 10000 USD and 1 BCH ~3000 USD
nobody knows. A logical short term development could lead to a 50% reduction of BTC.

Today: 1 BTC ~ 2600 USD and BCH = 0 USD
After HF: 1 BTC ~1300 USD and BCH ~1300 USD
Mid/ Longterm I believe we will see something similar to ETH and ETC.
2018: 1 BTC ~ 10000 USD and 1 BCH ~3000 USD