Not possible to go to the zero. I never see any FUD other than some people were complaining about the movement from ethereum from POW to the POS but this mostly done by the POW maximalist. Just seeing the market right now to know about the truth. I don't even think bitcoin will be going down to the zero again along with ethereum. People were using ethereum smartcontract and this always giving valuable reason for the price of ethereum will still remain the same at this time.
You shall not call any bad comments as FUD and some time if that was just a critics.
I find it odd that there are people out there that want ethereum to disappear, ethereum is one of the most important coins in the market and many other altcoins are running above it, if it were to disappear not only it will bring a huge crash to the market it will also bring enormous chaos as many coins which depend on it will be left without a platform in which thy can operate, so it is not on the best interest of anyone that ethereum disappears.