Although within this community Bitcoin is practically the only currency in which everyone believes, just look around a bit and we will find thousands of people who think otherwise.
At this point I wonder, what reasons should we give these people to make them realise that Bitcoin is a right choice? The first argument that comes to mind to convince a person who is sceptical about Bitcoin, is first of all that with Bitcoin you no longer need to delegate the custody of your money to a third party (banks, mutual funds, etc.): you are the master and you hold them. What else would you add?
I think that trying to convince anyone who is skeptical is a bad idea. They would see the attempt of someone trying to convince them of something, especially something which has to do with them investing money, as a an attempt at scamming them somehow.
No matter how well-structured and logical your arguments are, some people push back harder the more you try to convince them.
I believe the best method of dealing with those kinds of people is to just show them your positive history with Bitcoin. Show them proof of how Bitcoin has helped you. Especially show them your return on investment (ROI).
No better way to convince someone than to show them hard proof.