1. There is no restriction that the asset being borrowed and the collateral are in the same asset class - loans can be extended based on whatever criteria the DAO in charge of the Dai votes on. There are a number of loans backed by real property investments in the US, see [0] under RWA. There are a number of loans also backed by large holdings in US bonds.
2. Dai is pegged to the dollar. It can be instantly exchanged with the dollar at a number of onramps. It is not equivalent to holding volatile crypto like ethereum.
[0]: daistats.com
> How I can take out a collateralized loan, anywhere in the world, without having to ask for approval?
I agree that the overcollateralized loans backed by crypto are less useful unless you want to be investing crypto, which is what I mentioned at the beginning of my comment. I am not the commentator who said the thing about anywhere in the world without approval.
Loans in decentralised finance use smart contracts, instead of relying on the legal system.
Code over law.
Huh? That confused the heck out of me. How would you get the same car that you're renting in a different color?