Yes, I've lived through (and seen in other countries) far more cases of demonetization (USA is a general exception in this regard) than prolonged large-scale (city-wide or larger) internet outages, which pretty much never happen - they're even more rare than prolonged large-scale electricity outages.
In all kinds of countries the chance of demonetization is something like 5% per year i.e. on average every couple decades you have some sort of currency reform where everyone will have some issues with cash, I've lived through three such occurrences myself; and if you don't live in a place with really shitty infrastructure then the risk of your area (as opposed to some rural place where breakdowns affect a tiny number of people) having a total internet breakdown that's not resolved quickly is much lower than 5% per year.
In all kinds of countries the chance of demonetization is something like 5% per year i.e. on average every couple decades you have some sort of currency reform where everyone will have some issues with cash, I've lived through three such occurrences myself; and if you don't live in a place with really shitty infrastructure then the risk of your area (as opposed to some rural place where breakdowns affect a tiny number of people) having a total internet breakdown that's not resolved quickly is much lower than 5% per year.