The government is still undeniable of the bitcoin's potentials to be a good currency, so it will never replace the fiat in the long run. However, crypto enthusiasts have always high hopes in bitcoin that it will be considered as a global currency in the future, but in reality the real picture is bitcoin is just starting to prove to the people that it can be better as fiat. And as long as the government will continue to be in its opposition, the people will never start to trust and see it as a currency far better than fiat.

Politics and business is one of the reason why government cannot adopt bitcoin fast since if they do that for sure there is a big sector like financing or banking system might get hit on this if government will give good acceptance on bitcoin that's why they didn't give any good impression on it to protect their own interest. So lets just hope that government will find bitcoin really worth to be a good option as currency since it can change some things in economy and lives of the people.

Fiat money is something that is valued out of its backing. The backing can be bonds, gold or can be some assets. With bitcoin, it is said that the value is generated out of thin air. This can be kind of mocking, but there is some backing technology that makes it more powerful than the printed money. In every country Black money is a big problem, people accumulate fiat and never spend it. This fiat can't be traced, with bitcoin these issues can be easily solved. If a huge amount has got accumulated taxation can be done accordingly tracing the user. This is little complex, but anything is possible with technology.

Even though bitcoin isn't widely accepted in most countries and by most sellers, it is still a much superior alternative when compared to fiat.

The fact bitcoin fights back inflation efficiently is already a good reason to consider bitcoin a viable currency for every aspects of daily life or long term goals.

Unfortunatelly most people can't see how they can be benefited by adopting bitcoin, so they don't create demand for it on the market, what doesn't incentivize sellers to also accept btc as payment method on their shops.

And then we have this situation related by many, which doesn't allow them to use bitcoin as currency on their countries.

We can't say this same sentiment for other people. Because the population of crypto users is still very small as compared to global population. In my opinion, a lot of regular individuals still prefer fiat because they are more knowledgeable about it. With crypto, you can't expect everyone that they know how to transact with crypto. For most people, I think, they are still more comfortable dealing with fiat. Crypto has their pros and cons, so for crypto users already, we can always take this opportunity as an advantage to enrich ourselves in this industry.

In fiat the countries have their own coin which is needed for their transactions and economy still it has an impact if the price or the value of it might go down sees that the government must need to take an action on it. Also the reason too why the government would like to use fiat than cryptocurrency of course they don't have any control over it its decentralized the reason why they need to make a way to be centralised at the same time adopt the innovation. In my country, they created an exchange also a centralized wallet to manage the transaction of each user.

I do agree with you on that and not only during market correction but because of that volatility when you spend Bitcoin on depreciating assets, it seems like you have waisted that amount of Bitcoin cos I remember a post some week ago about some investors buying an iPhone with Bitcoin and even when most think it was good news that Bitcoin was been accepted in many retail shops now but most believed that asset has a depreciating value compared to Bitcoin so, Fiat is still good in terms of daily transactions while I do appreciate my Bitcoin more as an Investment. 

it won't be easy bitcoin Replacing Fiat Money.
Fiat money is a legal tender and will always exist and cannot be replaced. Fiat money is easy to regulate and has become a basic thing in the country even though inflation often occurs.
  all countries do not agree with bitcoin only a few countries agree with bitcoin even though a small part is only for investment assets not for legal payments. Bitcoin in my opinion is vulnerable to money laundering and corruption because it is not easy to trace. and this is a fatal thing in the state that must be avoided.

I like this person's thinking, big respect to him...

the controversial line I like about him is when he says "fiat is the biggest scam". it is not easy for a businessman who still relies on a state regulation to say that but he dares to firmly say it, he must be ready with the possible sanctions that will be imposed on him, trully brave man.

Yes, that's right, bitcoin always rises in price in the long run, but you need to choose the time to buy it, because if you buy when bitcoin is at its ATH, then you will have to wait for profit much longer than if you bought it at the time of the market subsidence. Buy low - sell high, a simple tip that can help you become wealthy faster.