Lol... you know there's an entire industry of people whose full-time work is to evaluate what land/businesses/etc are worth, right?

But now we finally get to the real, underlying reason for all your comments. You (and many others on the far right) are afraid that taxing billionaires will reset our economy to a more reasonable level. And it will. A global wealth tax on billionaires will help create wider-spread wellbeing, discourage unlimited accumulation, and protect democracy from the insidious nature of hyper-affluence. Why anyone defends billionaires is beyond me.