What is Bitcoin? (2)

In the second part of the series of articles on what bitcoin is, questions such as the following questions are answered:

Is Bitcoin really used by people?

How does one acquire bitcoins?
How difficult is it to make a Bitcoin payment?
What are the advantages of Bitcoin?
What are the disadvantages of Bitcoin?
Why do people trust Bitcoin?
Can I make money with Bitcoin?
Is Bitcoin fully virtual and immaterial?
Is Bitcoin anonymous?
What happens when bitcoins are lost?
Can Bitcoin scale to become a major payment network?