Bitcoin is decentralized which is pretty awesome that we wil not be in the control of the government, it's value is not a subject for inflation where usual money is, so it's an opposite and we like it because it's freedom as well.
I think that is true but it is not an actual answer to this question bitcoin is a online currency that people want to have and need because of its freedom and the fact that is not controlled by a bank or something but only yourself and that is what people want.