In my personal experience, I first heard of it 1 year ago in a online forum game, people sold gold for Bitcoins, around March, gave it no importance at first. Now im kinda utterly commited to it. Really an interest subject of study.
I first heard bitcoin a year ago, when i saw my classmates posting here in bitcoin forum. They convince to use and join bitcoin to help myself to earn money in a more better way. After that i really earn money when i first started using bitcoin thanks to bitcoin it helps me to lessen my financial problems.
Good thing you are been lured by your classmate here and im pretty sure that you would earn more money in this furom but you must do hardwork first and don't be so lazy enough to post just to get payed from your sig aswell as read some important matter especially on altcoin section since you can earn more their if you try to spen some time and learn how to earn some bounties with them.