I mean its your decision at the end of the day, I don't anyone claiming it to be selfish has any real weight behind it.
Here we can talk about a lot of people thinking that there is too little Bitcoin (max supply only 21 million) for someone to allow that after someone’s death it happens that his BTC practically goes to the grave with him. The OP says it would be mandatory to avoid this in some way, but fortunately there is no law to regulate that
problem in crypto, even when it comes to assets in banks to which no one is entitled. In Germany alone, it is estimated that there are between
$2 billion and as much as $9 billion in such bank accounts, with the difference that sooner or later the money will go to the state if no one responds and claims their inheritance rights.
Even families can turn against each other, so I wouldn't listen to anyone saying you're being selfish.
This has become quite common, so sometimes we can say that it is better for family members not to be familiar with some things, because a lot of money means a lot of discord, quarrels, and even violence.