Good question. I only wanna add that traditional trading instruments suck and are not fun to scale. Highly centralized points of failure with truly mind numbing consequences that are difficult to predict and respond to. I've worked on forex systems and when the feeds get iffy things get real uncomfortable, real fast.

Blockchains could, maybe, provide an interesting global platform for fintech to migrate cross-border stuff to. That stuff is not reliable, the engineers are just hella talented