I've been using BTC for a while. I've been using it at exchanges, to trade altcoins and to order goods over the Internet, but I've never exchanged BTC with someone in front of me. At a store or between friends, or family. This despite having had long conversations about BTC with various kinds of people, and attending a few meetups.
Who has exchanged BTC F2F?
In my own opinion, selling a huge amount of cryptocurrency is very dangerous if you did not know about the person you are having transaction with, the best thing to do is just use a reliable exchanger in order to have a safer deal.
That's right, if you are not familiar with the person that you are dealing with and you are going to sell or exchange a huge amount of btc, that can endangered your life, something bad can happen as the person you are dealing with knew that you own huge amount, but its also a good risk so instead of being scammed over the internet you also have enough time to deposit your money from the bank, also better to have the deal in front of your bank so before both of you finish the deal you already deposit the money.