In the case mentioned by the OP, the "collateral" is concisely defined as CONCORD's right to shoot me if I fail to pay.

Obviously the player has nothing disposable worth the value he's trying to borrow, otherwise they wouldn't be borrowing the money they'd be selling the collateral.

Since CONCORD activity was the only collateral specified, in this case yes.

I believe there would be no other collateral involved because those were the specified parameters.

Can you come up with a logical situation where collateral would be equivalent to the value of the loan but the individual would prefer to not sell their collateral, instead dealing with a lender, to meet a financial requirement in-game?

Because I can't.

Not really, no.

Did you have an answer to my question about disposable collateral and its sale vs. a loan against its value?

I can give this one a shot.

Let's say you have a rare item, say a T2 BPO and you don't want to use it, but you DO want to leverage it's value in ISK.
So you use a third party to hold the BPO and gain a loan equal to the BPO's declared value. You pay interest or other important considerations and then at the term expiry of the loan receive your BPO back.

There are other "one of a kind" or "few of a kind" item categories, but that is the gist. (Another example is a rigged expensive ship.....)

When the item is difficult to replace, then selling it is not as attractive as using it as collateral.

Of course, the flip side is that if you have such an item

Eve is a universe built on harsh capitalism (IMO)

Any form of capitalism needs a strong financial system. Would it not be interesting if there was a way to deposit money into a NPC Bank corp and the ISK accusers interest over time.

Also from this NPC Bank, you could take out loans and if you don't pay them back conord will come after you.

This would be a good way for starter corps to build some financially stability and encourage different forms of game play.

Or am I just daft? Discuss and troll hard.

Player > Hi, I'd like to borrow 1 billion ISK please.

NPC > Great, just fill out this form and we'll deposit the balance (minus fees) into your wallet! Then, all you have to do is repay us in a timely fashion and CONCORD won't kill your ship.

Player > That's great!

NPC > Thanks for doing business with Eve Bank of Legitimacy!

Player > No no no, thank you.

Player then transfers 1b isk to his main and forgets that alt account ever existed, buying PLEX with the proceeds in an effort to perpetuate this scheme with a different "free" paid account.

Yeah, great idea! Sign me up!

Nobody I know would put their T2 BPO into a third party's hands.

Would you?