Popularity of Bitcoin is trending now but it doesn't mean that it is the new era of currency,competing into fiat currency is not as easy to defeat we almost use fiat currency any kind of trading and it has no limit to people even an illiterate person can use fiat currency,but in cryptocurrency only those person who knows to use the internet and have knowledge to work with Bitcoin can use digital currency.
Although currently we cannot compare bitcoin with fiat, but the interest of the people in bitcoin is now increasing and specially that of the young generation. I think in future a time will come when all the people will be able to use bitcoin. They will be using bitcoin as their main currency. Even in backward countries people will be using bitcoin in their dealings.