The reason of price of fall is panic selling of many people. They are panicking because we hear bad news these days. And we are hearing bad news because bitcoin is becoming more and more popular. There are some people, governments, banks, etc. that don't like this. Their attempt to decrease the price is due to bitcoin popularity. Otherwise they wouldn't try to decrease the price.
Hopefully, bitcoins be legal worldwide but it is banned in few countries. I don't think it is the end of bitcoin. It has just began and it is just getting started, too far for bitcoins to come to an end.