This thread is starting to sound as if we're all going to be living in cashless society few years from now. I highly doubt this is going to happen anytime soon.
It's good to have a variety of different options to pay for things. Why does it all have to be smartphones, apps and pay by waving ??...What's wrong with cash ??...Majority of my purchases are paid with bank card using debit, but I still carry some cash on me and use it often.