I really don't think that most people believe in bitcoin, faith is placed in the technology and what it can provide, I really think that decentralized blockchain is going to be extremely useful for humanity, but it only takes more people to realize its usefulness.
I think otherwise, although blockchain technology is very useful, we can only see it's true form when every sector of the society will take advantage of it, like government and private industry.
What people do is really believes that bitcoin will make them rich, we have seen it happen for early adopters and it could also happened again with bitcoin reaches another all-time-high in the next couple of years.