i would however ask some questions.
how did this scammer get access to your friends facebook.
how did the scammer think that out of 1 billion FB users, that you knew about bitcoin, to even attempt this extortion on you specifically
how did the scammer know your location to have come up with the story that involved using your location to extort you
how did the scammer know that you had enough FIAT to do such a transaction EG that you were not a student with only $100 to your name.
how did the scammer know you had enough trust with your friend to even attempt such a conversation, and that you were not just some random FB friend add request
did the scammer ask you to deal with a certain person to give your FIAT to

usually stuff like this works out if it was just luck or that you were well researched into your wealth and relationships and that you were targeted. usually meaning someone in your friends list or someone that personally knows your friend done it.
my 2 cents are on a targetted attack on you by your friend or someone that knows your friends maiden name, favourite pets name and date of birth....