If you have a non-crypto friend who talks to you about this circle, listen to how he describes it.
If he calls it "cryptocurrency", there is a good chance he knows something about it, at least he shows respect, and you can have a deep conversation with him.
If he calls it "digital currency", there is a good chance he has a neutral attitude, and you can have a simple chat with him.
If he calls it "virtual currency", quickly change the subject.
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