Based on the fundamental factors on the bitcoin as you said above and many institutions addopt the bitcoin around the world include Surf Air Joins the Growing List of Private Airlines Accepting Bitcoin and many more, it can go $15.000 before 2018, the aim of hard fork is mean fixing on the bitcoin's network to be more better and it is not about the new alternative coins, just remember the total supply of bitcoin is just 21.000.000 Bitcoin and of course it will be effect on the bitcoin's price to be more expensive than today, the alternative coins because of the bitcoin's hard fork is just bonuses and there are no related with the bitcoin's price.