~
Well obviously Bitcoin. It's already going around the world actually. Maybe not that adoption that many people imagined, but surely it is the one that it is getting the attention more than the other coins out there in the market obviously.
People still prefer traditional method just because they feel safer in banks than in decentralized currencies.
I expect this since before as not all have that kind of appreciation towards that market.
The said adoption will it moves slowly and little by little people will understand how it helps to our lives. Education and full support from the government will help to fasten the adoption. Without such awareness and support, I can imagine that 10 years from now we've found no huge changes but to expect that many were still doubtful and had no knowledge about cryptocurrency.