Be careful, but don't be scared.
Try something new once in a while, invest once in a while, sometimes you will loose money even when you are careful but you are gaining some experiences.
Don't be scared to start again when you fail in a business or relationship. Pursue your dreams a man in a marathon, the most rewarding time is that last lap, you have to give it more of that energy you got boxed up.
Be careful who you share your dreams with, here is a good reason why secrecy exists and why spoilers also exist. You have to keep that big idea under wraps until it is absolutely necessary for it to be out in the wild. But don't be scare to take your business proposals far or talk about it where it needs to be noticed.
You should invest in whatever you love after carrying out proper investigations about the inner workings. When you are satisfied with your due diligence then give it your all.
It is only someone who takes a big risk that can get a big reward. There is not shame in trying.