Forks are proposed solution in Bitcoin network problems, and if core developers decline it then that is the time that it will be a hard fork which means that it will create new version of Bitcoin with new protocol (split), but if core developers approved, it will be a soft fork like Segwit (not segwit2x). Nowadays hard forks become a new trend on how to make easy money out of thin air, after Bitcoin Cash hard fork there are lots of same shit coming out every month that doesn't really improved anything.
How can we claim this forks I have 5 bitcoin
If you have Bitcoin in a wallet that holds any amount of Bitcoin during the snapshot you will receive amount of fork coins (usually 1:1 ratio). You will be able to claim it after the implementation occur. Just import your Bitcoin private key to a wallet that supports the fork coin. Note that before doing anything, transfer all your Bitcoin to a new address just to be sure that it is secured. If you have Bitcoins on exchange and if they support it, they will credit it automatically to your exchange account.