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.
Well, I heard it from my classmate who already know what bitcoin and I also ask him to help me to make and gain bitcoin. In addition to that, after I heard it I conduct some research about it and Im so curious about bitcoin because they could make and earn money by using it.