It definitely is cool but also quite risky right because of reasons mentioned. The only thing i don't like about multi sig is if some kind of freak accident happens and now you have completely lost access to the coins. I guess it's all risky. The only thing I don't see as being super risky from a legal standpoint and from an inheritance standpoint is partaking in the Bitcoin ETFs. I know this is a controversial topic but honestly just for that ease of mind it is tempting for long term purposes. Maybe just setting up separate funds or a joint fund to be split and passed down that way I feel would be the simplest way to ensure the bitcoin exposure hits them, but then again it's never actually real bitcoin right and you don't gave the keys to the coins. Decisions decisions
The ETFs are nothing more than the traditional inheritance of investments. There are intermediaries, so it's super easy to tell the owning company who will be your legal inheritors and, suddenly, if something happens they own what you owned.
But, they
don't really own the bitcoin. They only own some contracts that
guarantee them that they own your holdings in case something unexpected (or expected) happens.
So, it's like having bitcoin but not having bitcoin. In my opinion, anyone who doesn't do self-custody only tries to benefit from price increases and not from actually holding the coins.