Only Self Custody. There are always people who you can trust for sharing the keys. You just need to be following Indian culture for this. We still believe and practice a joint family culture. I share my keys with my brother, sister, wife and my mother. However, they all are very much unknown what those keys actually mean. But, considering I die or can't use my funds by myself, they'll be able to do so. I've planned about how my family can inherit my coins, rather giving the custody away to someone/something else.