Secure your fortune.
Even if a financial instrument does not have options, they can be constructed by dynamic replication. You can buy a share as the price increases and you can sell (short) a share on its way down. Then you have constructed a "call option" and "put option" respectively. But there are some problems you must be aware of and that relates to liquidity. Some of the greatest financial frauds are connected with dynamic replicating of options. But in periodes of normal liquidity, you can create a "put option" on real estate share by shorting it on its way down.
You may look at an oil field as a real option. There are options on a lot of instruments, even options on options (second order options).
Imagine, having a call option on a put option on the Nasdaq future in march 2000. That had given you a tremendous leverage. Options were first constructed as insurance. A put option secures your asset against price falls. It secures your fortune when you are in the market. A call option, on the other hand, secures you when you are out of the market.