Oh that's interesting, but tbh this is like blockchain 101 (store hash of legal document on a blockchain) and only handles the "make sure that the document is official" rather than hiding the content of it, you still need to hide your will somewhere where it won't affect you if it's leaked and you're still alive.

Haha yeah I thought of doing kind of a treasure hunt, but I figured that it's kinda useless, Also it would require a lot of planning when alive (can't be too easy right ?) and there's the risk that someone would find the stash by random luck (eg you make a hole in the ground in a random forest and 5 years later that spot is sold and some construction workers find it when digging)