That is not a fundamental question. Everybody agrees that people should be generally allowed to take risks. However, we also constrain those risks in all sorts

That is not a fundamental question. Everybody agrees that people should be generally allowed to take risks. However, we also constrain those risks in all sorts of ways so that we can run a reasonably safe and effective society. The eternal questions are which risks lead to generally positive-sum activity and which tend to be dangerously opaque, negative-sum, or with strong negative externalities. You can see this is almost any serious activity. Not just investment. Think of food, or transport, or construction.