Since the advent of screw-on caps on bottles, the 'hobby' of 'Bottle Cap collecting' has largely gone the way of the 'Dodo', (very quickly). (See also 'Hub-caps', 'Radiator caps', and the like.) With the entry of 'Digital Currencies', and the reliance on money shifting and payments from 'cash' to 'e-transactions', are we seeing the death of coins, (as we know them)? Will coin collecting 'pass' the same way that 'Bottle Top' collecting has? If it is to be so, in what time-frame? Interesting to know people's thoughts.