If Bitcoin will also grow rapidly as it did in 2016, it is likely that in a few years it will be used everywhere.
I agree to that. More and more people are liking the advantages bitcoin has over traditional fiat currency and are accepting it on their business. Moreover many poor countries have been using it and less of fiat. However it does need more acceptance and spreading.
Once the acceptance grows the prices are bound to increase and then traders can happily trade of large volumes as well.
Yes, more people will liking bitcoin. Internet service is really needed in this century. So many business and services are using internet. I am sure that internet usage will be more often. I am sure that bitcoin will get more mass adoption in 2022. Japan will release 5g internet technology soon. I am sure that it will make bitcoin transaction faster than now, so no more complaint about slow transaction of bitcoin. I think bitcoin do not have problem in 2022.
It will be like by many people but let's be realistic with it, though bitcoin will increase its user for this 2017. I don't bet that it will make all the nation and people use it on 2022. Because the world is too wide and we can't guarantee that all the places have internet connection and does have a knowledge with bitcoin.