It is simply a wicked problem, and not the one Crypto is intended to solve. Crypto is intended to automate the role of the trusted third party. Bitcoin's ledge

It is simply a wicked problem, and not the one Crypto is intended to solve. Crypto is intended to automate the role of the trusted third party. Bitcoin's ledger is much less intelligent than even the dullest central banker, but it has no self-interest. In cases where the trusted third party to a transaction has a reason to abuse their power - see e.g. 2008 bank bailouts - having a transparent algorithm handle that role is a massive savings. The problem of assigning creditworthiness remains, it's just that there is one less party whose trustworthiness needs to be assessed (and compensated). It's not that it solves the creditworthiness problem, but it makes the problem easier for others to solve.