[acdha]

It seems different from end to end encryption in a key way: we need things like TLS because sending a message unavoidably requires network traffic to traverse networks outside of your control. In contrast, using cryptocurrency is a choice to use a system modeled on the wrong data structure for either privacy or efficiency. Trying to kludge privacy on top of that seems like a very expensive and highly risky alternative to acknowledging that the system is incorrectly architected for the problem.