Some people like the Brazil Central Bank Chief called Bitcoin a Bubble & Pyramid Scheme, how can the bitcoin industry prove this wrong and make sure bitcoin never ends but grows bigger?
I think as long as there are people who believe in bitcoin and do bitcoin it will never be out in the market. And as on what you said, bitcoin doesn't need to be proved just because someone said that it is scam, if you look on the other side many people are using bitcoin right now because they see that it is not a scam. People are the one who makes bitcoin a scam not the bitcoin itself. So if people just use bitcoin in a proper way bitcoin will never be a scam.