It is okay to risk a high amount of money only if you know what you are going to risk to. Make sure that you have an idea into it for you to be able to avoid the big lost cases. It is indeed true that having a high amount of risk will have a big result but do not forget the fundamentals before investing. Research everything about the project that you are going to invest to.
Go for it if you have the ability and strength to face the consequences. In my opinion why to think of risks, if you will put your focus on the big results, huge profits you will be more confident in your investment and would not be fearful of risk. Risk is the basic element of every business but very well written you should know the nature of risk you will face that will help you to deal with it.