How to become a billionaire without founding a company or inheriting your wealth

At Unlimited Net Worth, I aim high and am serious about growing wealth.  Rather than simply aiming to become a millionaire, my ultimate goal is to become a billionaire in United States dollars (it would be cheating to use some other high inflation currencies, like the Zimbabwe dollar, where you can obtain a $100 billion note easily).  Why aim so high?  In high cost cities like New York or San Francisco, one million simply doesn’t go as far as it used to.