There's nothing as painful as losing a loved one, be it a friend or family member. My condolences to you mate.
Regarding investment, everyone should make a way for NOK (Next of Kin) or a sibling(s) (in a situation where one is not yet married) that can take control of the person's holdings. Situations like this can make an account and Bitcoins stored there, remain there forever and which will never be able to flow into the market.
Having a document where all these important passwords, keys, phrases etc that are required for possession be made known in rare, but close times. No one knows when death can happen, and for that, one can't prepare for it. That's why it's called a thief, it comes when it is not or least expected.