I would like to note here that this topic is not for comparing "bitcoin vs fiat currency", here, the main goal is to discussing bitcoin as a unit of account in the future.
It takes a long process for Bitcoin to become a digital currency that has its own unit of value and Bitcoin must go through several main factors and Bitcoin must go through more mature stages, but for now I think Bitcoin is not yet stable and cannotto replace fiat currency.
There are also other reasons why Bitcoin cannot be used as a separate unit of value, such as prices often rising and falling very quickly, as well as government regulations regarding the determination of Bitcoin as a legal means of payment in general, like fiat and also other factors.
For Bitcoin to have stability and mainstream currency, it's a long argument. People always talk about this, but it's never been easy or even possible, even in the near future, because there are many factors to have this privilege, which are looking not possible right now. Its use is not as needed due to the fluctuation of price, which is always the biggest one.
Development is possible; it needs time and more use because as people enter and they have more use, things will come into a streamlined state, and it will work better, but all development needs enough time, as mentioned; maturity is key for this. After this, stability just because of these factors is not going to replace fiat in the near future.
