>Couldn't be stuff like a $500m personal loan to a startup CEO, secured by said CEOs stock in a private company that has negative cash flow and no real assets, which he also happens to control? Surely there is no reason to doubt the quality of collateral like that.

As a startup CEO with available stock, an actual positive cash flow and no _real_ assets.. please tell me where I can apply for this type of loan? Because all the loans I'm looking at are 3-8% interest and requires me to sign over my personal assets as collateral in return for a paltry $250k. I'd rather use that loan to just buy more real assets for myself instead (which is what I am doing)