What is upside down financing?

Excuse me, could you possibly clarify what you mean by "upside down financing"? It's not a term that I'm immediately familiar with in the context of finance or cryptocurrency. Are you referring to a specific financial strategy or perhaps a unique financing method that involves a particular asset being held in a way that is not the traditional norm? I'd be happy to discuss further and offer insights based on what you have in mind, but some clarification would be helpful to start with.