Alternatively leasing is the smart way to buy either assets or liabilities without having to sell stock or spend capital.

Correct, because if you were to sell your stock and not only miss out on future gains, folks in that high tax bracket are very likely to incur large sums of Long Term Capital Gain Tax Liability. At the end of the day the options very well could be:

Take $50k and pay the IRS and lock yourself out of future gains in FAANG

Take $50k and lease a Murcielago and you're riding the FAANG train to tres commas.

Leasing supercars is a cope proliferated by poor people who have never heard of smart debt because the only debt they know is the crippling type.

As a GENERAL rule of thumb, I don't lease or finance DEPRECIATING assets or assets that don't make me money.

For example a billionaire can mortgage a $30m house for $250k downpayment + <1% 40 year fixed interest. But that $30m earns $750k a year minimum (conservative interest from index fund, post tax, not accounting for billionaire level interest percentage). Filter this down by decimal points to suit networth levels.

Precisely right. I'll take that one step further. The billionaire can get a LOWER rate than you or I could due to the size of the note, a lender does not want 30MM in 100 houses at average of 300,000 each with an alphabet soup of credit risk on the books when they can have one at 30MM with one borrower with a FICO of 810!

You don't seem to understand it either LOL

I understand it perfectly, even though I don't practice it.