In the current issues about banning of bitcoin in other countries, maybe it will too long before it will be adopt globally. It seems like 2018 is a young age for crypto and it takes time before other countries will consider cryptocurrency as part of their economy. Time will come, they will adopt to the trend but as of now, it is impossible to happen.

It is not accepted almost in every country except Japan and few parts of Russian countries. What happening is, we are using it the way we want on the power of decentralised nature of the bitcoin and nothing else. Neither of the government in the country has accepted the bitcoin with full fledge or none of them are willing to accept it in first place.

We are able to use it just because of the unity and huge investment that goes into it and kind of democracy is taking over the government jurisdiction. But that won't last long if bitcoin is being used in the wrong way.

It's impossible that all the countries will accept it by the year end. Not practical way but may be just the way it is being used currently.

yes, I see by the end of 2018 bitcoin will dominate the world, meaning many countries are adopting bitcoin. today many countries are already providing support for bitcoin and crypto world. such as USA, china, japan, canada, russia, even in arizona already have bitcoin tax regulation.

and also many world leaders who have started to be interested in crypto. and this will help spread both bitcoin.

Looks like bitcoin is not just simply has not adopt by every single country yet, I think there are even countries about bitcoin existence or only few people there know about it. As time goes, more and more people get into btc as earning opportunity and good investment but also more and more government go against it gor many reason but primarily the anonimity it has. Let's just hope that btc be legalized everywhere but don't think it could happen this year

What do you mean by adoption? I think it will be still illegal in some countries, but there is more possibility for some restrictions. I do not think that it will be absolutely free all over the world. We should not spread bad news, but we should be realistic too.

Hopefully it can happen and I hope it happens so there will be no more bad news about bitcoin which causes the bitcoin price, and I think it can happen.

In many countries all over the world it is banned or restricted, so I cannot be so optimistic. But this do not mean that it will be banned worldwide or smth like this, it is just answer to your question 

if by countries adopting bitcoin you mean something like what Japanese did, (calling bitcoin a legal way of payment with 0 tax on the payments) then no. it will probably take a long time, somewhere between 10-20 years and some countries will never do that.

besides this doesn't matter at all. the only thing that matters are people who are the peers on this decentralized aka peer to peer network. they have to find out about bitcoin and want to use it or not. and that has been happening worldwide. I don't know of any country in the whole world that does not have at least some people interested and involved in bitcoin. and that is the world wide adoption.

The VISA credit system took decades for development and worldwide adoption, I suspect Bitcoin may follow a similar timeline, but will probably occur much faster. A small number of countries have outright banned bitcoin, so truly worldwide adoption cannot be achieved. But in the free world, bitcoin is certainly like to explode in usage, particularly once the lightning network is finalized and stores can begin accepting super low fee transactions.

I predict a 2-3 fold improvement in userbase by the end of 2018, 10 fold by 2020. Beyond that it is vague.