If BTC forked, It will be a setback for the bitcoin, it will instantly loose its value or gain depending on how either sides acts,
at this point for time, no one is sure to tell if it forks or not, clearly segwit will not get 95% support, neither BU gets 75%,
so if you are really sensible and you would wanted to go long, hardfork is not an option for BTC
split in the network will also have less difficult to mine the coin as hash rate will be divided between 2 chains
at the end if hardfork happens one coin will die eventually and one will rise.