Lol private keys are not valid collateral (and if even dumb enough to say that you will use this as collateral)... well this is second message on forum since you learn immediately how to ask a loan , you must learn immediately what is a valid request...

however, if there are really good intention (of course not but...) if you don't trust people that provide the loan, ok send your collateral to an escrow.
otherwise we have another user that try to scam asking loan.