I think there’s a fear of deflation as we are so used to living with currencies which are, as a matter of government policy, supposed to lose value at a steady rate (2% inflation target).
One interesting view is that if Bitcoin succeeds it will give people more time to discern what to spend their money on.
Are you aware of Jeff Booth (npub1s05…eyhe) ‘s work? It gives good reasons to welcome technology’s ability to make lives better and not to fear deflation.