Your friends are working hard on their online jobs. Maybe you don't see them working at office or factory but it doesn't mean that they do nothing in their lives because they are working hard online. They just prefer home based jobs where they can use their skills and talents where they can earn much compared to typical worker. On line jobs such as signature campaigns, web designing, product promotions, typing jobs and the like opens a window for them to earn money at home at their preferred time but it requires skills, patience, effort and time to reach the expected result of the producer. In exchange, they earn bitcoins as form of payment that they can use as an investment or convert it into cash. That's the reason why your friends has a lot of money. If you are interested also to earn bitcoins, ask your friends to educate you and I'm sure you will also benefit.