There will always be doubters. Bitcoin can't convince everybody. But it's normal to witness former unbelievers getting converted one after another. I myself doubted Bitcoin at first when a family member introduced it to me. I thought it was some kind of a dirty investment scheme, which the world is overflowing with. You can't just embrace something new without suspicion.
However, while it's all right to admit being wrong and become a supporter, I guess it's also fine if you aren't convinced and choose to stick with the status quo instead, especially if you're benefitting so much from it. The issue it seems is with those who already saw the value of Bitcoin but can't swallow their pride.
It is natural to be suspicious of Bitcoin since world is full of scams but most people go through process of initially being doubtful about it and then eventually becoming its supporter once they realize that it is system that can be trusted over years.
Although those who gain out of current banking system will not have reason to switch, there are others who will be stuck in pride trap where they are too embarrassed to admit that they were wrong all along when they call Bitcoin useless. Although there is nothing wrong with people being comfortable with what they know, history tends to favor people who are able to admit their errors and use new technology.
It is amazing that you have overcome your doubts, and it is question whether those who continue to hold on to their pride will be eventually forced to use Bitcoin or they will avoid it forever.
