I have question on this tutorial - How are you ensuring the value part of the equation. Lets say I own one of the cryptokitties worth $100k: https://www.cnbc.c

I have question on this tutorial - How are you ensuring the value part of the equation. Lets say I own one of the cryptokitties worth $100k: https://www.cnbc.com/2017/12/06/meet-cryptokitties-the-new-digital-beanie-babies-selling-for-100k.html https://www.cnbc.com/2017/12/06/meet-cryptokitties-the-new-d... What happens if the cryptokitty loses 10% of its value? And how does the contract know this loss in value?