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.
Entirely false. Poor countries don't even have any establishment to buy from using their bitcoins. Even if they do have bitcoins because they work online or whatever, they would still have to convert it to fiat first so they can use it. This is the same case even for first world country people. The bitcoin community is much smaller than you think it is and the number of people using it doesn't increase that much too.