I've seen more and more articles from the media recently that float the idea of abolishing cash and forcing people to store money as demand deposits only. They are primarily in favour of such a move because it is argued that it will reduce criminality, make it harder to people to avoid taxation, it allows banks to lend more money, etc.
http://www.news.com.au/finance/economy/australian-economy/should-we-scrap-the-100-note/news-story/0e480aa7b1f24b5c2ef063f2a3b30fb7
http://www.smh.com.au/federal-politics/political-news/cashless-future-will-save-billions-and-requires-red-tape-abolition-alex-hawke-20160216-gmv8ka.html
http://www.abc.net.au/news/2016-10-21/world-awash-with-cash-fuels-illegal-activity/7933250
It is fair to say that the banks and the government would love to go cashless. For the banks it would allow them to expand credit without the risk posed by customers converting their demand deposits into cash. The banks know that if they set negative interest rates for demand deposits, this would led to customer pulling cash out en masse, which they are in no position to accommodate. For the politicians, it will provide them much more power to regulate our lives as all transactions would be recorded, it would make it easier for them to tax, and it would make tax avoidance more difficult. It would also make it easier for them to institute bail ins (losses worn by depositors) rather than bail outs (losses worn by tax payers) for when our big banks go belly up.
All I can say is that everyone should keep a close eye on these developments, and plan accordingly.