Apple Cash = digital currency
ACH = digital currency
Direct Deposit = digital currency
Bitcoin = Digital currency
Credit/Debit Card = digital currency
Cash = an annoyance
I guess you are trying to make a point but if you don't have your head in the sand cash and bitcoin mean the same.
Not when it comes to blackmailing someone safely from another country.
There's a reason ransomware asks for Bitcoin and not cash, credit, Venmo, etc. It's the only non-reversible payment method on your list.
Cash is non reversible.
Again, there's a reason ransomware doesn't ask for cash. It simply doesn't work for ransomware style attacks; you need an immediate, irreversible payment method that doesn't put the ransomer at significant risk.
Cash may well be 'irreversible' in the same way as bitcoin, but how exactly would these criminals physically receive cash from all of the victims? How else would they be able to demand and receive these vast payments anonymously?
edit: I'd prefer to get counter-arguments for genuine questions instead of downvotes.