There's an idealogical collision course between safely offering usernames+financial transactions and maintaining an absolutist stance on encryption.

Within minutes, you'll have people going by @ElonMusk and @JeffBezos running scams to millions of non tech-savvy users. Are you going to try to stop that in any way? Can you, while maintaining full encryption?

I can appreciate Moxie sticking to his guns, but he'll need a better plan than "we'll deal with the problem when it comes." if he doesn't want to get deplatformed by Apple/Google or face government scrutiny.