> The due diligence you're describing is only necessary because the custodians can actually improperly handle the money. Embezzlement is a real thing in the traditional system.

Due diligence with loans has nothing to do with 'embezzlement' and everything to do with evaluating the creditor's probability of repayment from future earnings. You can't assess whether someone's business plan is high or low risk with a smart contract.

Embezzlement is more likely to be a problem when you're giving your money to a service as obviously shady as Nexo (a website which in addition to having the unusual model of borrowing fiat at 10% to lend it out at 5.9%, pointedly avoids saying where its based even in its legal documents, or what licenses it holds on its 'view licenses' page, but is very keen to promote what licenses and audits its founders' other business has in its marketing material...)