What's "cash"? A marketable security? I'm insanely poor by these standards but wealthfront will front me hard cash using my account as collateral with one clic

What's "cash"? A marketable security? I'm insanely poor by these standards but wealthfront will front me hard cash using my account as collateral with one click i think up to 30%. Super cheap interest rate. Bezos has way more favorable banking. Even if he was 'only' worth $10-15 billion I bet he could get 2-3 billion in hard cash overnight. He might not hold a lot of cash, but he doesn't need to he can get it immediately without selling.