The only one who know my coins investments, wallets, private keys, is me. So the question is how to inherit this information to my family? to give them privilege to access it after I passed away 
.
.Create a very detailed instructional video as part of your last will and testament. Watch, edit and re-edit several times and make sure that a layman will understand your instructions. Since you are passing it to your heirs which are not knowledgeable enough to redeem the riches which you saved all of your life.