Yes, $10 has "magically" disappeared. Consider this case. I buy a used car from you for $10000. You now have $10,000 and I have a car worth $10,000 (let's assum

Yes, $10 has "magically" disappeared. Consider this case. I buy a used car from you for $10000. You now have $10,000 and I have a car worth $10,000 (let's assume that i got a fair price and would be able to resell it for that amount too). A day later the Russian army hits my car with a mortar. You have $10,000. I have some scrap metal. Rather than $20,000 worth of stuff, there's now $10,000 (plus some scrap metal) total.