I heard it back in 2011 where in there was a huge hype of mining Bitcoin using GPU's and there were numerous facebook groups where they posted they rigs and also had many tutorials for other to follow or even customize their rigs in order to work better.
I heard about bitcoin talk 1 month ago from my friend , he told me about how to work in bitcoin and share some video about bitcoin talk.
i also heard bitcoin from a friend, recently. she told me about the member of bitcoin and earning that they are getting to bitcoin. out of my curiosity i read what bitcoin is, and later on my friend taught me how to join in bitcoin.