One way to break the bank is to take your entire net worth and then use it to purchase commodity futures contracts on margin. Go overboard with it and you'll probably go bust.
The same is true for assets like gold, industrial metals, grains, or even art. Think of risky investments like you think about salt: Too much could eventually kill you, but too little can be bad in other ways.
But if you follow that advice, there is a chance that you might throw out the baby with the bathwater. Many people will tell you to stay away from risky investments.