I think too many people are getting to know Bitcoin from around the world and it is this reason why it keeps growing over and over again and so getting more powerful by the day through our private and public discourse.
I agree with you many people around the world are joining bitcoin. So more people are investing that means that bitcoin is growing. Also some shops now accept bitcoin you can pay then with bitcoins when you order a pizza. This is also why bitcoin is now growing. People are supporting it that means that they want to have profit because of bitcoin.