No, because they are not exactly correlated with your gains. For what it's worth, you could have an unrealized deficit but still owe taxes. That's why it's a we

No, because they are not exactly correlated with your gains. For what it's worth, you could have an unrealized deficit but still owe taxes. That's why it's a wealth tax and not unrealized gains tax. Real estate is included in that wealth, of course. And it has a different tax treatment than "usual" stock market gains.