Is it possible that your project will completely get rid of the need to convert crypto currency into fiat?
I would say that there is definitely the potential for achieving this high goal, but much depends on the sellers themselves.
I do not think that they will refuse to use the protocol, which allows to significantly expand the audience of buyers.
You are right of course, but the introduction of new technologies is always a risk. So I'm afraid that the current market players can try to interfere with this.