This is where education comes in... As you engage in Crypto activities, your circle(family,friends) should be aware too.. you should teach them... It is always advicable to backup your seed phrase offline and one way to make it accessible could be writing it down somewhere... If anything happens, your circle are aware that such thing exist and they may be able to look through important documents that you have to find it in case if emergency......
 Nobody can really be trusted anyway, if not it you could be able to tell someone about the storage if your seedphraseso they may be of help when something bad happens ..but like I said nobody is really to be trusted as you may be betrayed and lose all your funds