I like Bitcoin and understand its advantages, but I doubt very much that it will be used so widely. People love fiat money as they can touch it and keep under the pillow.

maybe in 2022 everybody will use bitcoin because now bitcoin is booming and now bitcoin price is high enough but some countries still do not know bitcoin the reason in their country may not yet able to access internet because most of the population not yet familiar with bitcoin and will take a long time to be used and widely accepted.

Have five years is a long run. There will be many changes happen because of technology, we do not know that the country that are not computerized today will change to be a computerized world where crypto world exist. There are no longer people that  do not use internet.

Don't say it finish. Maybe it will lead to a great reform specially in the system of banks and market but it can be a hindrance to the poor countries. Year 2022 is a short time to adjust people all over the world. In order to acknowledge bitcoin, it is needed to have different research about how the people come up in the trend. Government will not also take a risk to change system of buying. Probably, there are many criticism when bitcoin will be implemented in other countries. I am not contradicting what you have said. I am just thinking the bad side when fiat system eliminate in earth for just a short run.

I do not think that every country can accept it even if it is in the future it can not happen. There are many limitations that bitcoin brings so it is very difficult for this to happen in 2022.

As it is, with problems occuring every once in a while regarding transactions,  bitcoin couldn't probably cope up with it's growing user base. However, if by the time lightning network has been implemented, it is possible that in 2022 majority of the population will be using it.

Agree. It's too difficult for most people. as i's necessary to spend a lot of time to understand the blockchain...
So, I think virtual currency will not enter our daily life so soon

Fiat will always be around, and I think it won't disappear, with this high transaction fees,practically, everyone would be using fiat than pay for each transaction they made.

2022 is still far, but if you look at the social media and others, you could always find a talk about bitcoin, including those big ones, they are now talking about bitcoin, so when it comes to spread of knowledge about it, I think it won't take long, but when it comes to use, I think it will take time.

There are a lot of possibility that may occur in the future and no one can predict any of it yet. There is a possiblity that fiat system will be destroyed but there's still a chance that it will not be. Banks will be tolerating the blockchain system and it will lead to a further improvement of all of it. We should expect more that bitcoin will keep on innovating and will be known by almost everyone in the year 2022.

As for my country many people using it already, but many people can't due to lack of money to buy desktop or even smart phone. And due to poverty many people here in my country doesn't even reach high school nor elemenetary. I guess bitcoin would reach everybody if their/our economy become better.