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.
There is no reason to convince people to choose Bitcoin because everyone has their own beliefs how they can believe in something. Not everyone believes Bitcoin as one of the currencies, that's not true in my opinion because we still need Fiat currency, we only believe Bitcoin as the best investment at the moment.
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?
That is the advantage of bitcoin because we are the sole owner and are not controlled by anyone, bitcoin is also able to maintain value in the long term as an investment and price fluctuations can bring us to the stage of perfection in investing, if we understand the investment pattern and know how to analyze bitcoin journey.