To me it is just Crypto vs non-crypto digital 'money'
But it is also about Owned vs non-owned systems

All we need is an "app" so I can pay you or the merchant.
No need for plastic cards. And it is this that has the elite bankers scared IMHO

But assuming my coffee shop takes crypto and so does my landlord as they both have an "app" I just transfer crypto as needed. I don't need FIAT unless I want to deal with someone still on that old system.