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.