Does your memory serve you to answer this question: 1. Who's money was in the account of that ATM card? 2. In what world currency was it in and did was that currency moreor less stable for at least 48 hours??
I'm afraid your analogy to a ATM card is flawed. However, go for it if you think that is the future, along with sea shells, leather hides, beads, and mistletoe. Best of luck in whatever you choose.
There are a number of very significant issues regarding "everyone's" usage of digital currency that remain unanswered.
Ease of use, traceability or not of transactions, consumer confidence, everyone having access to digital currency systems, extreme volatility, (did I say consumer confidence? ), not the least of which how many batteries it takes to mine bit coin at night in the DR.
Many people won't use ATM's in the DR because of their lack of consumer confidence in ATM machines. Now lets decrease that confidence exponentially by injecting digital currency into the mix.
Of course some people will continue to use it, but universal? I highly doubt it unless many changes are made that defeat the original purposes for which it was originally created. Governments realize that they need to address further developments or miss tracing money laundering and lack of tax payments. Stay tuned for updates on that.