Half the adult population on this planet do not have a bank account. For them, everything is in cash. They constantly have to worry about being robbed, and are unable to save for the future.
There are many Mobile Banks in developing countries that are trying to address this problem. They are half way there! Unfortunately not all transactions are possible, and a representative is often needed to complete a transaction, driving up costs.
The goal is to have a fully electronic currency system.
Launching in 2017.