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 it to may sister using while she is using her BTC account.
I ask her what is the use of bitcoin and she briefly give me an information regarding the use of BTC and importance of it.
It is really depends on us if we are interested or not, I hear bitcoin a long time ago but just lately I concentrate on it. I really thought that this is only a payment system where I can bet in my gambling activities but later I realize there's more I can do to earn money using bitcoin.
Now, I am a satisfied trader and I do it daily so my income is very active, thanks also that the price just pump late though it's a big off now.