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I live in an area that tends to get very inclement weather from time to time, and the last power outage was last week. Though it didn't last long, it was enough to cause my local convenience store to only accept cash for the duration of the outage. And what happens if you don't keep any cash on you (like many people these days)? You're screwed.
That's why I hope the government doesn't have plans to eliminate cash entirely. It's fine if people choose to not use it, but I think it should remain available as an option.
Cash is very important and indeed it cannot be replaced or eliminated.
Digital money may have advantages over cash, but digital money also has disadvantages such as your experience when the lights go out and you only accept cash at your store. even digital money is very vulnerable to being hacked by others via the internet.
Transaction records can also still be made in cash, using paper notes if necessary so that the transaction can be recorded.
Technological developments that are getting faster and more advanced do have a better impact, but there are some old technologies that cannot be eliminated, such as cash.
The use of digital money is only an alternative to an easier transaction.