As soon as majority of the world is informed and knows about digital currency, what do you think will happen? No matter how good it sounds to traditional banking, how much of the population will make cryptocurrency grow?
If we can get enough people to adopt bitcoin and therefore have a mass adoption, then this is truly special.
Essentially what is going to happen if we get, say 50% of the world's population to start using bitcoin, we are going to basically get the central banks, commercial banks, all of them out of business because they've just lost 50% of their customers! This in turn will make them have to reduce their competitiveness because they're not raking in as much anymore. This will fuel more people investing in bitcoin.
What i see happening is that bitcoin is going to see a lot of growth in userbase over the next few decades and that's what is going to ultimately fuel the increase in bitcoin price.