I have couple of ethereum holders as friend and right now they are in worries about the upcoming hardfork ,well this is my opinion
-the upcoming hardfork is just an upgrade ,don't expect extra coins for holding ETH
-its ethereum damn it, If you are thinking it might lose value after the upgrade you are wrong ,I don't say its impossible but of all coins out there ETH stands out ,its no shit coin and remember the dev is a smart guy ,he knows what's best ,either it goes POS or not ETH is still a champ
Don't dump or live to regret it.
why should they be worried? Hardfork is just a major network upgrade to make the Ethereum network even more better. They should be happy about the improvement and be worried only about the vulnerabilities that might be found on the network.