Two of my friends now pay for virtually everything by using their mobile phone.
One friend, a retired doctor, never carries cash, and hardly uses his bank cards, i am not even sure if he owns a wallet full of plastic, as everything is done through his mobile phone.
Recently, we went out for a nice meal in the local Indian restaurant, he paid using his phone.
Technology has certainly come a long way, and its possible that the next generation will have no use for cash, resulting in everything being conducted online, hence the trusty mobile phone.
Most of us now have a mobile phone, but paying for everything via a phone, that's the way forward for many.
Banks are now increasingly trying to get us to bank online, so in the not too distant future, bank notes and coins may be a thing of the past.