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 all that happens bitcoin capable of known by many people then surely more and more the offline merchants who use payment with bitcoin, So with that everyone traveling will definitely not forget to bring their gadgets because with it they can make transactions everywhere either with barcode bitcoin or the other.