? 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.
Many many of this people above u mentioned got their earning public anyway. Even when they won't disclose exact amount you know they have millions of $ for example. Second group of people you mentioned are people that disclose that information to get something from it. Look im wealthy man, so i know what im saying or im successful so listen to me etc.