Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Why is gold not a good investment? 
If you buy a gold brick and put it in a pillow, after one year you still have one gold brick. People may value it more than before or less then before, but it's still the one gold brick you had. If you buy a cow and put it on a pasture, after one year you have a fatter cow and plenty of milk. You now have more of the cow and milk you didn't have before. Now that's an investment.