Ten years ago there were people that thought cash would no longer exist by now, and the same applies to twenty years ago. I don't think cash will disappear that quickly. We had credit and debit cards decades ago, but they haven't completely replaced cash yet. Bitcoin could become more widely used, but I don't think it will ever replace cash.
That was not what I was saying, nor what the banksters in that room were thinking answering that question. It will just mean you can't walk to the ATM anymore and get some cash, or pay cash in the store: Because you know, terrorism, the children, drugs,
negative interest, full government control, etc.
Bitcoin sure helps of course, because it is so transparent by design compared to traditional banking.