According to CNBC, federal prosecutors had launched a criminal probe into the cryptocurrencies earlier this year based on suspicions that their price was being manipulated. I think it might be the main reason behind the price of bitcoin dropping to around $4000, but I also wonder whether it could be that authorities are afraid that Bitcoin and other cryptocurrencies are taking over the financial system since they're now so popular.
Fake news affect bitcoin price ddown
Bad news affect bitcoin price down
Whales maniiptlation affect bitcoin price down
And especially volatile fluctuations
All the above are basis why bitcoin price falling down according from people analysis
But until now there nothing to proof how really true that is the main reason of bitcoin fall down
For me the reason why bitcoin fall down because is affeted of world economic crisis
People need to survive making money in bad ways