...good answer.? I watched this video here
http://www.youtube.com/watch?v=Um63OQz3bjo


This is what I've gathered from this video
1. you get bitcoins by running a mining program. At first you gain bitcoins easily and fast, then mining gets harder and you get bitcoins slower, so you can't become a millionaire that easily.
2.Bitcoins are like cash, not credit card or cheques.
3.can be used internationally.
4. not managed by anyone. Nobody can just generate tons of bitcoins like the US is printing tons of money.

5.can be used to purchase stuff if the store accepts bitcoins.

So, you get free bitcoins. With the free bitcoins, you can purchase anything you want. If you have a powerful enough pc or have enough patience, you can become rich just by sitting at home. If 100 years later, bitcoins were used instead of money, people would get free money just for owning a computer. Someone explain please.