What Islamic Finance needs first and foremost is getting rid of every dharra of riba. You can't build halal business with a currency where riba is baked in. As soon as there is a "USD", "EURO" or any other fiat currency in the core, it is rotten.

It saddens me to see, that most Muslim finance guys don't get this.

How do I come to this conclusion? I'm not making this up, I'm not in the position to make Islamic judgements. I'm just conveying, what I heard from more knowledgeable people. Namely this incident from the seerah: https://islamic-marketplace.com/ethical-website-creation/ (Part: "The reconstruction of the Kaaba in Mecca")