There is going to be invoicing protocol in the next Bitcoin version. Let's see what kind that will be. Other than that, money before Bitcoin has never been a c

There is going to be invoicing protocol in the next Bitcoin version. Let's see what kind that will be. Other than that, money before Bitcoin has never been a communication protocol, but a centralized database where the database keepers benefit from network effects & locking in the customer to that specific database. So it is pretty obvious IMHO that no good protocols have been developed around it.