Negative news are prepared by whales but news are spread further by retail investors, weak supporters and haters. Haters wait for falls of bitcoin to make their noisy voices. People include the retail investors and weak supporters listen to the voices from haters and believe it is the truth.

Whales are observing how news are spread out and keep smiling when their preparations make sense. 

It must be because the sharp and continuous drop in the prices recently after bitcoin reaching another ATH, they think that it is probably the last ATH in this year so they are being fearful as to what is going to happen to future of the market since it is uncertain.

It happens because of what Elon Musk is doing, he manipulates the market specifically the Dogecoin so beginners who follow him and trust him will surely get hyped about this altcoin. Dogecoin creates a big hyped in the crypto community as it already rose too high this past few weeks, so I can't blame most of the people who keep on making some negative thoughts about BTC because they see how dogecoin moves but not to the point that Dogecoin can reach Bitcoin that won't ever happen.

I don't know where they come from. But it's really a classic thing about Bitcoin. When the price surges, too many people start talking about Bitcoin by lauding it. But when the opposite happens, we immediately start seeing people talking negatively about it. I've really got used to it. 

The FUD has always existed. The FUD is spreading when someone tries to harm someone, the basic idea is to create uncertainty and confusion about the whole concept of cryptocurrency by using an argument like: "bitcoin is not useful anymore", which of course is not true. The fear will not go away and the old FUDs will only be repeated over and over again.

Where have you been lately? I haven't seen seen a lot of negative posts about BTC lately. There are a few as there always are but I have not noticed that there are more of them now. In fact, I have seen many positive news lately. China is now considering Bitcoin as an investment alternative. Time Magazine accepts Bitcoin as payment. And fresh from the oven, Venmo's 77 million users can now buy and sell Bitcoin. It is a matter of which news is significant to you.

I don't think the fall in Bitcoin's price is due to Dogecoin's supporters.

Dogecoin will not be able to take over Bitcoin, because the price of bitcoin is already very expensive and bitcoin already has more supporters than Dogecoin, in my opinion it is impossible if Dogecoin can take over bitcoin. the negative news that appears at this time is only to drop the price of bitcoin to take advantage by buying it at a low price, I am sure after that the price of bitcoin will go up again and will reach $ 100k.

There are way too many for it to be just regular Joes trying to negatively affect the price. It's probably a spam coming for large whales in an attempt to further dump the BTC price. Corporations need this so they can buy up lots of BTC before the actual high of this halving.

This happens every time there's a correction. Part of it is legitimate newbies who feel scared and hopeless and need to rationalize their decision to exit Bitcoin market, perhaps even at a loss. Another part is trolls and Bitcoin haters who spread negativity about Bitcoin as a hobby. And the last group is hired shills who work for traders/market manipulators who want to see Bitcoin dive deeper so they can buy more coins before the market starts growing again.