Not at all, cash is a terrible way of conducting illegal transactions, doubly so at scale. There's a reason the cartels used to use binders of gift cards - and now, well, Bitcoin.

It's practically impossible to get meaningful quantities of it without having a SAR or CTR filed against you. Denominations are small so having a large amount is visible, risky, bulky and inefficient. Not to mention hard to explain away. And it's practically impossible to deposit meaningful quantities of it without having a SAR or CTR filed. The whole modern financial system is designed to catch criminals using cash.

Cash does a good job of threading the needle, taking into consideration the need for individuals to have a peer-to-peer, anonymous, offline decentralized currency while also taking into consideration regulatory and compliance needs.

I've nothing against cash, it has it's place, and no need to put words in my mouth.