I don't think it works thru social platform aside from here (bitcointalk.org), scammers are really big on social medias especially on Facebook and Twitter but I didn't know that they also exist on Instagram, now we have another reason to be more secured.
Its ok to trade as long as you have the assurance but if you don't know the person you're dealing with then you must be careful, luckily your friend deals only for a small amount, learn from this mistake and don't trade again to anyone easily.
it turns out that in various social media including Instagram there are people who try to make money by cheating, and in my opinion for the security of money we need to be careful for anyone to make transactions whether individuals or companies like exchangers, there is no place 100% safe to make transactions, but we must be smart and carefull to choose who we make transactions, guarantees in conducting transactions are also needed because this is one of the risks of holding a cryptocurrency.