I think it is still not enough because people priority that they need safe transaction and bitcoin still not so trusted according to other that they are afraid of scammers.. and i think if we build a bitcoin banks and every country it can help to build trust by many people that can increase more people to use bitcoin..
Because if we think it well it is impossible that all people use bitcoin.. since not all people or place has internet they  can not use bitcoin in some places or areas without internet.. so they will still prefer to use fiat..

I'm sure if bitcoin will definitely become increasingly popular and increasingly used by many people in different countries, but I'm not sure if bitcoin could have the whole human being on earth, it is impossible happen

As said bitcoin will not reach the entire world population even if the adoption, acceptance and usage continue to increase gradually. The reason is that users need to be a bit knowledgeable to use bitcoin which is not possible in real world.

I think this is possible to achieve if the government support the bitcoin movement.  Information online can be easier to spread in just a click of a mouse.  Unlike century ago, where you need to travel lots of miles and several days in order to spread news.  In the current technology it made possible to broadcast information to citizen in just a matter of seconds or minute.  So I think 6 years is long enough to reach out internet people and advertise bitcoin and encourage them to adopt bitcoin (this is if bitcoin is supported by government).

Yes, I agree.. I think there is no coins or even cryptocurrency that can destroy FIAT. Not all people can relate with bitcoins or cryptocurrency. Im sure blockchain technology is also unfamiliar to others. Although many people have already educated about bitcoins still many are not. others are only starting to use bitcoins. Bitcoins can be popular as it seem but to replace Fiat.. That's impossible.

You are right that in next five year the bitcoin will progress more than in the past but i am not agree that in 2022 everyone will use it . Because i saw many people who knows bitcoin very well but not interested to do with Bitcoin .

There are still many years to come before Bitcoin becomes mainstream. For the next few years, if the ecosystem continues to expand in this way, in fact there will be a much greater number of merchants and consumers adopting Bitcoin. But in 2022, I think this is still going to be a small percentage of the world's population, unless things speed up, with the development of killer apps and promotion of Bitcoin on a larger scale.

Absolutely, we cannot expect the whole world will use bitcoin because there's paper money that's simple and easy to use.We do not need to use internet to transact and not all people are thinking of seeing their money grow to invest in bitcoin.

Majority of the people are just working for survival.

in 2020 if 20% of the world start using bitcoin i think it will be a good progress, as still there are so many backward countries who educational ration is still very low, their people have very little access to computer and internet. but we can expect that the new generation will be more educated so we can expect that they will have access to interment and computer in future but still it will take more than decades when these people will get benefit from bitcoin.

People had joined bitcoin in the past and left when the bubble occured, media has the great opportunity to damage bitcoin, at 2020 bitcoin should return to the 1000 dollars, and people should get interest into it once again, but they wont consider mining the best way to get bitcoin, they will buy directly. I dont know how many people will afford to buy bitcoin, but our community keep growing, even slowly, all days a new person joins to online earnings, and bitcoin is part of those.