Whenever economists, politicians, or bureaucrats claim market dynamics are causing the declining use of cash, remind them that what's happening is in accordance with a plan outlined by an IMF economist back in 2017 (see The Boiling Frog for this plan).
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Economists have actually posited that a design criteria for a well-designed Central Bank Digital Currency (CBDC) is to facilitate the phasing out of cash:

They say "the digital euro will complement cash", but have designed it to make abolishing cash easier. Funny that!