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...
I agree the main reason on opening a topic regarding on people saying that bitcoin is dead is because of the total dump on its price. Some people not all, always want faster thing or an easy way to earn so when bitcoin price dump their always do panic buying not knowing that it will pump on a right time. So if people will always depend on price no doubt that bitcoin may die on a near future for mishandle of many bitcoin. But before it happened i guess the technology i more develop that day making bitcoin alive again with a better transaction and price pump.