Welcome to bitcoin!
Bitcoins can be used to buy merchandise anonymously. In addition, international payments are easy and cheap because bitcoins are not tied to any country or subject to regulation. Small businesses may like them because there are no credit card fees. Some people just buy bitcoins as an investment, hoping that they’ll go up in value.
The TED talk above discusses how the bitcoin came to existence and why it gained popularity. The video also comments on the criminal aspects of bitcoins, revealing the negative aspects of online currency. I found this topic interesting because I never knew what bitcoins were, my Uncle uses it, and my friends have done tons of research on it.