maybe that makes the price of bitcoin on this exchange place fall back because of the bad news circulating and maybe also because many countries don't want to accept bitcoin as one of their payments.
In my opinion there are many factors which cause the falling price but we should not be panic and should be cool and patience in this time. bitcoin investment is not for short time and to make money from bitcoin we will have to wait for long time. market manipulation is the main reason for downing price of bitcoin. Low demand and low mining also cause low price.
People are not investing in bitcoin and the demand for bitcoin is almost zero these days, thats why the price is falling, so that it will catch investors attention and they will put their money again in bitcoin. By this way, the price can be controlled. The future of bitcoin is very bright and to ear the fruits of bitcoin you should hold your coins for long time and dont be panic.