Many people are just propaganda eaters - hucksters looking to make a fast buck. But there are many more still who work on building the project along every day. If BTC continues to have value, people will choose to support it.
People have been conditioned it from their entire lives to respond like that, just look at all the people buying new smart phones because they think they need those smart phones, but if you actually asked them why do they need them they will be unable to answer, why they are getting rid off their one year old smart phone which does 99% of the stuff that the new one does?