Lending Platforms at Risk while BTC Sky-Rockets?

Hi guys,

this is my first post here even though I've been reading for some time already and hodling Bitcoin since 2015. I couldn't find this topic neither here nor anywhere else, so please be patient if I missed something.

My question is:
Do you think this incredible increase of BTC value is a threat to the centralized lending platforms like Nexo, Celsius or BlockFi? My thoughts are: if these platforms are selling Bitcoin to pay out the borrowed amounts in FIAT (or stable coins) and the price of BTC sky-rockets before the loans are paid back, it would be very difficult for the sites to buy back Bitcoin to credit to the borrowers and also pay the interest to the investors on the long term! What do you think about that?

Just to make it clear: I am fully aware of "not your keys, not your coins", so please don't start a discussion about that. My question is more general from an economic point of view.

Thanks and happy New Year to everyone!
MiE