Your suggestions are good. However, if thieves or kidnappers do not kill you for not giving them your crypto, they might leave you a souvenir. For example, they might shoot you in the leg or break your leg or arm. So, in a situation whereby you live in an unsafe environment and you're a crypto millionaire or billionaire, as the case may be. It's best to relocate to a different country with a lower crime rate and better security, for your safety.
Anything that has to do with disclosing of assets is actually very dangerous because criminals will start targeting you and will.be bet for them not to put there self in any form of this situation because people need to even learn to take there security seriously because when you get attacked there is a very high chance that you will not even you won't leave there alive.
Because they will not want to even leave a trace about it and they will do anything possible for them to get away with your founds so the best thing is knowing who you are getting involved. About your assets and this is for the security reasons.
People are always after peoples life because of something they can rob them off so the best we can do is to learn from this things and save our self from a lot of things.