Absolutely not! there is no reason to fear from btc hard fork if you have btc in your account.
You are going to get both bitcoin and bitcoin cash in your account and in the future you will be able to exchange your coins. BCC no doubt going to affect btc for some time but not for long time after some time bcc will be treated as a altcoin because it has different vision and team from bitcoin. Bitcoin is going to maintain its upward trend because segwit is going to activate sooner.
