Digital currency is a disaster waiting to happen. “Money” which disappears whenever the Green New Dealer shuts down the grid wherever you are. And shut it down they will, in the Sacred Name of Mother Gaia, if our enemies don’t kill it with an EMP first. And you will die. But that’s a feature, not a bug.
MONEY is tangible: Gold, Silver, Lead and Brass for example. Men carried little sacks of gold, silver, and copper coins around for at least 3000 years. Are you so weak now that you can’t still do it?
An EMP can’t take out global, redundant and shielded servers.
If things completely brake down, only bullets, like minded people, and food will matter.