what the title says

I keep my coins on localbitcoins.com wallet.
I`m going to sell all my coins before 1 August.This might be a stupid decision,but i don`t care.
I`m not a long time btc holder.
I`m curious what will happen with all the bitcoins storaged in offline wallets,when some hard fork happens and bitcoin splits into two different coins.
This is important, choose what you want to do and then do it, if you decide you want to be out of bitcoin when all of this happens then that is your call.