Must I really trust the cashu microcosm where I enter to exchange? If I can get rug-pulled by a system, someone is going to rugpull someone. And, that system set the victim up for the crime if I didn’t make it REALLY evident at the outset. Better yet, make it impossible.
Discussion
You can't make it impossible. Crime is always a crime. You can make it more difficult, but never impossible.
But, criminals aside, there are plenty of good players trying to make good experiences for users. They are just buying this idea that they don't need to invest in resiliency, security or better systems to manage other people's moneys. Because it this field, people don't do anything when others steal from them.