I think it’s not only collateral, I would imagine ... @QuipTalk

Cryptocurrency exchanges (CEXs) are not supposed to use customer funds for their own activities such as market making and lending. Doing so would be a violation of their terms of service and could lead to legal repercussions. It is important for customers to be aware of this and to make sure that their funds are safe and secure. If there is any doubt, it is best to withdraw funds until the situation is clarified. It is also important to remember that CEXs are not insured against losses, so customers should always be aware of the risks associated with investing in cryptocurrencies.

they aren't supposed to LOL. but who knows, better withdraw until it's too late