Earlier quoted context omitted.
> The sort of activity which led to the financial crisis would not be mitigated by the establishment of a decentralized currency. It actually would deal with the issue that led to the GFC. Remember --- the problem wasn't that there were fraudulent mortgages -- it is that these mortgages were packaged and repackaged in ways that deliberately obscured the risk involved so that people were buying stuff that had no under…
Pricing a CDO is an NP-complete problem, so having them "transparent" on a blockchain does nothing. https://www.bogleheads.org/forum/viewtopic.php?t=44818
Yes, you can purchase a bad CDO on a blockchain just as easily as you can purchase bad real estate in real life. Nothing prevents humans from misrepresenting data. But that isn't the point of the blockchain.
The point is that the transparency of the blockchain lets you (and others) know when you're holding a lemon, because you can see in real-time that no-one is paying off the mortgages in your CDO. What you do when that happens is a good question and the blockchain can't help [1], but it doesn't crash the entire market because people can tell the difference between your CDO and the quality ones that are still 100% good.
[1] it actually can help in one important way -- it provides an indisputable record of contract execution and payments that is not contained within the computer system of your counterparts (the bank). So if there is fraud it will be much easier to prove it to the courts than if you need to subpoena records out of the bowels of a corporate banking system.