That "theoretical" wealth clearly has a massive impact on the real world, so it's silly to pretend it does not exist. For example, Elon didn't buy Twitter with a giant bag of gold coins -- he borrowed against his wealth, which is mostly in stock.
Because no sane organization will lend out real cash over the same amount of collateral TSLA stock, and leveraged lending opens TSLA to extremely high risk as value dropping would means Musk will be forced to sell to cover/and or stake more TSLA. This is exactly how FTX failed - they counted their own token as their "asset". Spoiler: it didn't work.
Does this wealth have a high impact on the world? Of course it does. But does it has the same impact as same volume of cash? Absolutely not.
> Unsold stock should not be quantified until the moment it is sold.
I don't know Elon Musk's finances, but I imagine that he's got a bunch of stock, (let's say) an amount of cash in the tens or even hundreds of millions and debts well above the amount of cash he has on hand. If you don't count unsold stock, then Elon Musk is poorer than most college students.
I agree the numbers are misleading (e.g. Bill Gates money is very diversified and he has already paid many of the capital gains on microsoft stock sales, so comparing his wealth to Elon Musk's with a single number is quite misleading). But you have to count unsold stock for something.
I trust money more than wealth. Unsold stock should not be quantified until the moment it is sold.
It's getting tiring to hear about "so and so billionaire lost X billion". No, they didn't lose anything that they didn't have to begin with. Having more stock than the trade volume of that stock means all of that "wealth" is mostly theoretical.