? You can look up the net worth amount on every famous actor, athlete, and businessman. No reason to live like a hermit because a few outlier events that happen. Do you see people like Vitalik or Roger Ver being kidnapped or attacked? No you don't, stop being so paranoid, that is no way to live life.
Not everyone who's rich is a famous person. You also don't know about the precautions (if any) Vitalik or Ver are taking. They're also famous enough that it wouldn't be a smart idea trying to kidnap them as more resources would likely be devoted to find someone known.