If he is an influencer (or crypto public figure), founder of a crypto project, then the only way is to hire a bodyguard for his security, wherever he goes must always be accompanied to maintain security, likewise their families who are potentially kidnapped must get the same security team.
However, if this kind of thing happens to me, of course I feel that the world is not free because I have to be followed by many people, it is better not to be an influencer and or show off my BTC ownership and it is better if no one knows at all, I think that is much better and live peacefully.
Criminals are now modern and organized, they are much more dangerous, especially in countries that are too free or have low levels of law and security.
Hiring a bodyguard isn't practical for small investors. Big tech employees & whales won't have to worry about hiring personal security because they've got money to protect themself & their families. Criminals won't be put off if rich ppl hire bodyguards they'll try to find a way to kidnap.
At least you should understand that criminals should think twice if you have security around you my friend, you won't be completely empty, and I think the thief won't go after poor people so they don't care about a small influencer/small investor or small crypto player, because they must be thinking "what to steal from you?" unless they have a personal grudge to steal your underwear.
The issue of physical safety for BTC or cryptocurrency hodlers has been debated many times on the forum, and following several kidnappings of crypto influencers' relatives in France (but these kidnappings obviously also occur in other countries), how can btc influencers ensure their safety and that of their loved ones?
How can they both have visibility AND ensure their safety?
One of the most important things for a crypto holder, especially those who are known in public places, is to work on keeping more personal information private. Since crypto is decentralized and pseudonymous in nature, while it offers the same benefits as altcoins, it also makes it a target for identity theft. Maintain strict security measures and live a luxurious lifestyle, i.e. do not swap yourself on various social media platforms.
We are not talking about crypto, we are talking about bitcoin, I hope you should understand the meaning, but if you mean both, it is better to never be seen with a lot of money in public, just act like an ordinary person to live safely from the target of kidnappers