Understanding this level of finance is not hard and I don’t understand what you’re trying to prove or your resistance to it.

What a billionaire is doing is no different (as a radical simplification to make it easy to understand) than a normal person taking a home equity loan. Your argument is that “the home isn’t real” and that’s the same as saying “SpaceX isn’t real”. The home’s value can fluctuate thanks to the real estate market, or whether or not the owner does a good job maintaining and upgrading the home. SpaceX can suffer market fluctuations and be well managed or suffer bad decisions. The money leveraged on the values of these investments is real.

As far as what you just said I can tell that you haven’t thought one step further than making the statement, I am pointing out how the money is real. We’re done here, you plainly want to be right rather than learn how the system works.