It's interesting that they knew wrong from right when it comes to finances, yet they objected and fought the Messenger (PBUH) so fiercely.
"جحدوا بها واستيقنتها أنفسهم ظلمًا وعلوًا"
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")