I'm sure as time lapsed it is certain that all countries in this world will receive Bitcoin and Bitcoin will be more popular even the price will be very high.
If bitcoin doesn't succeeded some other cryptocurrency will for sure. The worst case scenario is that governments around the world start to close up exchanges in hope to limit somehow use of bitcoin, or to ban it and try to take down people that are using it, but I am sure that they understand that you can't drag down peer-to-peer network that easily. They have been trying to do this even with torrent clients and we can see how that ended up - they can't stop p2p sharing. They can't stop cryptocurrency out there but this doesn't mean that they won't try to regulate it, ofc they will try to regulate it in some way because we have to pay taxes, other thing is that taxes are pretty high and our countries around the world could function normally with less taxes if it wasn't for those people that rule and are hungry for money.
We have already seen that this change is started and we are seeing it takes effect day by day, it will take time when cryptocurrency will be out there where we wouldn't think that there is FIAT but we are approaching that goal.