The amount of people trading in bitcoins are very limited vs the people who use fiat, there are so many banks, a whole economy that is dependent on fiat, so I do not see bitcoin replacing fiat any time soon, true that the demand for bitcoin is increasing , but people still trust the age old fiat ,since for most of the people around the globe bitcoin remains to be esoteric
at the movement it is not possible that bitcoin is not is in the position to replace fiat may be in the future.If we speaking about present time u are totally right. But future is coming, and who had cell phone, computer 30 years ago? Look what kind of phones we had 10 years ago, and look what we have now? Digital era is comming and bitcoin will find better place in that then fiat. When will that come, who knows, we can just make some speculations. What will happen with btc when people start to recive salaries in btc? When I think about it its possible that alt coins will replace fiat one day.i takes or need too much of time for this.
If you don't know, we are in the Information Age, also know as the Digital Age, obviously, it is not coming, it is here a long time ago, to be exact that will be 50 years ago. Bitcoin might be a good currency but I think it is more risky to use a digital currency which is so volatile to replace a well and stable fiat. Fiat is also controlled by the government that depicts the country's economy, if government will not be able to control the money and cannot collect taxes, which is described as the blood of a country, you can imagine what will happen to the country and it's people, it will be a disaster.