I think he's doing 15% every month, not every year. It's not an implausible growth rate for a unicorn startup; it is implausible to expect it.

He talks about 15% _per month_

It’s a good point, I should have compounded the 15% m/m to compare with 2.5% economy annual growth rate.

15% monthly

> These numbers are ludicrous.

They are also speculative, not real. They are based on the notion that the company would be worth that much based on projected cash flows, expenses, etc. If you actually tried to cash it all out at any point in time you could not get anything close to that because the very act of selling will lower the value by destroying confidence in the speculative valuations.

None of these SV billionares have billions in cash or cash equivalents. Maybe a few of the largest companies do.

That’s not really relevant. Billionaires still get the perks of being billionaires. Diversifying may take time and financial engineering but billionaires clearly get benefits and usage from their assets. How do you think Bill Gates spent billions on his projects? Billions CAN be spent.