As your investments begin to mature into a considerable amount, while you consider the security and safety of it, it is also important that you consider the situation where you die suddenly and your Bitcoin gets lost; no investor would want that except they have no family and friends worthy enough for it.
We not having family or friends shouldn't stop us from passing down our wealth because there are charity organisations that need help financially hence passing your inheritance to them is a good gesture that'll do well for the people in need than to allow your money to waste as nobody gets access to it when you're gone. Planning is a good habit to have because it'll help you stay organised and avoid some unnecessary things like people fighting over your wealth and causing betrayal among family members. It'll also give you peace of mind that when you're gone, your estate will be distributed well among people you loved while you were on earth. Rest in peace to your friend, I hope you're drafting your own will soon too because telling us to make preparations while you aren't doing the same is wrong.