The betrayal stories I've heard about always get carried out by trusted people, those who are very close to you and you also trust them, a stranger can't betray you, it is always someone you know very well, when money is involved, the devil will keep lurking around, I advise not to trust any living soul, keep your wallet to yourself, we have heard about wife killing their husbands because of money and properties, a lot of money is powerful enough to corrupt the soul of the living.
Even if people we trust often betray us, I think Crypto can be said to be an inheritance to our family and children in the future, because we don't know when we will die. Just a word of advice regarding crypto inheritance with significant amounts of fiat:
1. Use an air-gapped hardware wallet, don't throw away the original packaging (box, manual, etc).
2. The private key in the form of BIP39 is printed and laminated, then covered with an easy-to-remove sticker.
3. Put both (including packaging, etc.) into a locked safety box.
4. Save the safety box in a trusted bank deposit box.
5. Make a will with legal experts, which contains concrete steps on how to access and monetize the crypto as completely and as clearly as possible, including what if scenarios if there is an error (we assume a lay person accesses).