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. Personally, I do think its a good idea to set something up, although I think there might be better ways that going through it via coding it in, or even using a dead mans switch. Ultimately, it depends on your threat model. Whenever we are talking about major wealth, then having a multisig setup could potentially be dangerous, you only have to look around you to see how far some people are willing to go to get their hands on wealth.