Cashless society isn't better i think. I can't see anything good in digital money to change everything. Cryptocurrencies are good but not when government have control under it.
Maybe not just digital currency that will be a populer, virtual currency like bitcoin too that I'm sure will have many users and popular in the future, because they also have the same flexibility and usage that is in use online, so I think when the era of technology starts, digital currency will dominate as well as for cryptocurrency