The idea of quantifying trust as threshold amount of money you expect someone to embezzle or not embezzle is quite innovative. But in a pseudonymous context large amounts of trust can only be reasonably established via reputation or personal trust.

While the idea of personal trust and its implications of transitive trust are the subject of web of trust systems, I have been thinking about decentralized reputation system for quite a while - shortly after the emergence of Bitcoin in fact.

I have developed a theoretical reputation system called Quantified Prestige, which is based on quantified esteem attributions. Only rather recently, I realized that Nostr provides a suitable basis for this system in a decentralized context. Those esteem attributions can easily be implemented as custom Nostr messages. It's just aggregation across relays and Sybil protection that require some relatively elaborate mechanisms.

The result is indeed "merely" a reputation score, but as a global starting point for interactions with unknown pseudonymous actors that's certainly a good starting point.

Here is a recent introduction to Quantified Prestige: https://yakihonne.com/article/naddr1qvzqqqr4gupzqn3rp2esmvczf7md3vmemc2u82mxwjzsttag8scc0g2myhz9cujfqy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qq4w4352dj2w3gxunm2g364s6zpwfexjjm6tqt2dsd9