If your tokens are stored in your wallet, perhaps your closest person will not know your key. When a person dies, there is a high probability that the tokens in the wallet will disappear forever, which is equivalent to being destroyed， So that the price of the currency can be increased even higher, but if you tell the closest people the key, they may sell a large amount of bitcoin after you die, which violates the consensus and characteristics of long-term bitcoin holding.
it's true that if the key is not known by others and we die, all the tokens we save can be lost or like being burned, it would be nice if we gave the key to our own family so that the results we work can be enjoyed by them.
Another aspect of blockchain technology is that every holdings and transaction is only between you and the system and if someday the holders die and gone away no family members can inherit and our assets and holding will remain forever untoched in blockchain as there is no central control for this. The best thing to do if we have assets in crypto is to educate our closest how to use and gave them everything access for them to use.