Is it permissible for a debtor to pay the creditor with shares instead of the cash he borrowed?

Question:
Honorable Shaykh, may Allah grant you success. A person has a debt, and when the time for repayment arrived, he said to the lender, "These are my shares in place of the cash loan." Is this permissible? That is, he sold them to him for the amount of the loan. For example, if it were something other than shares, if he had a car, or food, and he was a borrower, and he said, "Take this in place of your loan."

Answer:
That is my opinion. There is nothing wrong with that, because the price of the goods becomes the loan that is in the seller's liability. So there is nothing wrong with settling debts this way. But shares are unknown. I do not know what these shares are based on, what is in them, or how they are traded. Are they just shares? This is unknown. Yes.