Coincidentally, since you brought up Libra: I actually think one of the biggest bull cases for crypto in general (not necessarily Libra) is solving this exact problem. You have an immutable record of all of your transactions that is not explicitly tied to your identity (just a public key). The role of a credit bureau when you apply for credit then would be to ask you to prove ownership of (one or many) public key(s) that they can then run algorithms over to assess your creditworthiness. They don't have to custodian the data at any point. They can be compelled to forget that you are the owner of a particular public key. The end user has full control over how their data is used. And creditors are still able to assess creditworthiness. Win-win-win-win.