This always happens when the price is in a downtrend...The ones stuck in fiat who missed the rally from $100 are trying to get others to panic and sell so they can buy bitcoins for cheap...
Some of them are trolls and just want the attention...best to ignore them...
That is the main point of people when they are saying that bitcoin is dead. If you do not know bitcoin well the sudden changes on its price may cause you to panic and think that bitcoin may stop on developing and it may gone or at the same time die on its price and process on the market. But as I have said the process of development also needs the decentralization or the down movement of the price of bitcoin in order to make a move on developing its transaction, price and its security features.
The only thing to deal with those people is to just ignore them because if you are well educated about bitcoin then it doesn't matter what are their saying over and over because it is not that how it works because your knowledge is enough for you to know if they are saying wrong or not. So it is better to keep feeding yourself with knowledge so you don't need to entertain FUDs.