But it does not make sense, if they bought when the price was 1000 then why sell when the price has reached its lowest point, why not sell at 10000 for example and get 10 times the money they invested or why not sell at 5000? Once you begin to really think about it you will understand that it does not make a lot of sense for people like that to sell their coins, because it is going to be almost impossible for them to get losses since the price is not going to touch those prices again.
I do not see how those news can be true, to me this is just the media doing what the media does, creating fake news to try to attract people to visit their websites.
It is just a fake website which chunk out news without any authenticity and never follow those fake media outlets, as you mentioned it does not make any sense for investors to sell when the market is low when they could have earned a good profit when the price of bitcoin touched an all time high and when the market fell everyone usually book their profits and wait for the market to settle down and no one will sell when the market bottoms.