Perhaps, with the increased traction of blockchain acceptance nowadays, could lead to the creation of digital fiat currencies powered by blockchains that are managed by governments themselves. With this in mind, there would be no need for physical cash, as digital fiat currencies would provide many advantages such as quick settlement, global payments, full transparency, implants use on citizens to make payments, and more.
If this becomes a reality, which I'm sure that it will, it would radically transform our lives for the better and reduce criminal activity as a result of the full transparency and auditability that a digital fiat currency would have thanks to the power of the blockchain technology.
Also, it makes me wonder if cryptocurrencies like Bitcoin would exist by that time, or will they co-exist with digital fiat currencies.
Nevertheless, I would like to know your opinion about this.
For now, i can say cashless society might happened for 30-40 yrs because some other people don't even know the existing digital fiat and if ever they know about bitcoins, some people might think of the bad possibilities that will happen to their account like being hacked. So i guess, cashless society is kinda awesome but still not adoptable today or even after 25 years.