I'm not buying bitcoins. Why? Because i'm earning bitcoins. And i also don't need to buy and i also cannot afford to buy as i'm not having any job as i'm a student, so my earnings are enough for me.
Earning from your signature? Bitcoin can give a way of earning yes becase there is a lot of opportunities for everyone to get bitcoin even if they are knowledgable or not. You can get free bitcoins to anywhere in the internet if you know where to seek.