Example. You have $1000 btc deposited in a lending platform, you can borrow up to 80%. You borrow $800 usd. You keep the usd no matter what. If btc drops to $850 then someone pays $800 (usd debt) and gets btc worth $850. The buffer is so assets never drop below debt value.
You could spend $800 but your total capital is $1000 vs $1800.
In my example, you would only be out $200 because you have $800 usd and the btc was $1000 when you put it in.
Even if you go get a loan from a bank, you need 20% equity and either collateral (this case) or co sign or proof of income. All collateral just the same. It’s just risked out to be possible to borrow many multiples due to the stability of real estate collateral.
In business loans, you have to put in 20% and the assets of the purchase are collateral.
It’s the same but crypto doesn’t have debt collectors since it’s not an org. Instead the collateral has to be in the system directly so they can automate liquidation.
This is a tool that lets you keep the car and get the $1k by mortgaging the car for the $10k. If car prices drop precipitously next month, you won’t get it back. But if they go up, then you have your car (now worth more than $10k) and you pay back the loan and keep the extra $1k you made too.
Perhaps you are familiar with house mortgages, etc. The closest thing a normal person would come to this is probably a HELOC.