The following paper by BoC is an interesting read in this area:
http://www.bankofcanada.ca/wp-content/uploads/2012/11/boc-review-autumn12-arango.pdfWhat I don't get is this:
"Canadians also use cash for purposes other than as a means of payment." - This is referring to all the banknote collectors or is it something else?
"For example, individuals hold bank notes as a store of value and for precautionary purposes. Indeed, the value of bank notes in circulation has risen at an annual rate of about 5 per cent since 2000, virtually the same as the growth in aggregate personal expenditures."
"Moreover, the ratio of the stock of large-denomination bank notes to overall consumer spending has risen since the 2007–09 global financial crisis. It would appear that the use of cash for non-payment purposes has grown markedly since 2000, even though the share of cash-based retail transactions has continued to
decline."
So what are these "cash for non-payment purposes"
AND
"In the early 1990s, cash accounted for more than 80 per cent of the volume and about 50 per cent of the value of POS transactions"
"In 2011, however, these shares dropped to below 50 per cent in volume and less than 20 per cent in value."
So the value of bank notes in circulation has increased but its proportion as the total of all POS has declined.
This just means we spend more now than in 1990's (of course inflation) and those who have been using cash still use cash.