FUD can play a role in the effecting a lot of coins but at this point of the game, there's no way that FUD can kill BTC because of its sheer size and adoption into mainstream application such as in Japan where its used alongside the Yen. At most it could ease a bit of the new people coming into BTC but the people that are already in BTC know its true value as something to make money off and they would happy to wait for the effect of FUD to drop the prices of BTC to buy in the dip for big profits.

FUD is much more likely to affect ICOs because that is a bad amount of PR for a soon to be released ICO looking for investment but again, savvy investors are able to look past the most basic FUD to see the diamond in the rough