So,.it'll likely the project can only be used by people who are familiar with crypto? Because to be able to work, your system require possession of private key.
Sorry my bad, the bitcointalk comment was suggestions, not a mandatory task, as you can see the form for registered was just asking for telegram and twitter accounts, anyway I remove the bitcointalk from there.
About your last question, our client target are not only people familiar with crypto, our goal is that users will be able to use our service even if they dont know about crypto.
How? Allowing people to pay the service with credit cards to fund their accounts. that way they dont need to know about crypto as they will just create an account on our service as any other, but they will have a private key which the app will suggest them to secure.
And how will your system decide when should the stored info passed to the successor? What's the trigger? And for the case where the predecessor create their... wills rather secretly, what made you sure the successor knows what the private key i about and how to use them?