How do you double youre money?

How do you double youre money?
If I wanted to double my money here is what I would do. I would look for a property that was for sale at a bargan price. You don't want to pay too much and take a loss. Then rent out the property. If you could rent it for 10 percent of the cost, then in ten years you would have doubled your investment. You would not have double the money until you sold the land. Then you would might have another gain or loss. Lets hope after 10 years it would be a gain.If the rent after taxes gave you over 10 percent then it would take you even less than 10 years to double your money.There are many other ways. I just said how I would do it.