A large majority of peoples in the world believes on paper money. They think that this is used for buying or selling goods and services. A currency which has a physically appearance in the world.
But the upcoming world is the world of digital currency. Because it is easy and reliable way for sending and receiving money at any place in the world. We can send or receive money within minutes.
But there is a huge difference between both these two types of currencies.
So, it is very difficult that Digital currency will be adopted worldwide. Because of the users are not aware of this new technology and they are not comfortable to use this mode of payment. Because they don't believe in this technology yet.
So, how we convince the peoples to adopt digital currency?

I dint believe that anybody needs to be convinced. When Bitcoin gets to that worldwide adoption if it will get there, everyone will naturally follow the part. People that understand Bitcoin now are the ones that are currently using it the way they see best, some still don't see it as a currency even when they trade it as just an asset. However, when the time comes, it will naturally work out instead of convincing people.