Take this quick quiz. You should do fine. Which of the following is worth more? A. Diamonds B. The Mona Lisa C. Oxygen D. Water Do the research. You will find out that the obvious answer is: #1: The Mona Lisa is BY FAR worth the most. #2: Diamonds are easily in second place. Very expensive. #3. Water is cheap. Actually it is free in most countries. There is a lot of water. If you have to purchase it, say a bottle of water everyday for a year, it would be about $60