Electronic Money definitely is the future currency, I foresee some countries will start implementing electronic money with base of bitcoin in next 10 years.
Cryptocurrency is actually the best currency for those who understand its usefulness, how to use it and those who have the information about it.
However, we have to understand that not everybody will have this knowledge, and while some will even have an idea of the electronic money, they will not be comfortable or will even find it hard in adapting to its usage. The two will still always keep serving their purpose.