I think this is not the one of the favorite topics to discuss but this does not decrease it's importance. You have amassed the crypto for your future and financial security of your family but what happen when the code (password) that is securing your funds would not allow your family to claim that assets. We all hope for the best but uncertainties in life can never be determined.
So it is necessary to teach your loved ones about the technical stuff , your account information and where they can find the keys in case of your demise. You need to teach the technical stuff so that they are able to do the transaction and access the wallets on their own as there are chance of fraud if they relied on other person.
I think you can share the public information like your wallet address with your loved ones and keep your keys on a safe or bank locker that will be only opened when execution of your will be done.
For bitcoin, I know there exist "Dead Man Switch" that can transfer the account balance to your heir if you are inactive for a certain amount of time but again your heir need to keep their keys safe and understand the technology.
On my further research I found that there are some blockchain powered solution like Trustverse and[Safehaven(]https://safehaven.io/) though I have no idea how safe these companies are and how they works.
Whatever the method you choose but make sure that your holding should be passed to your heirs.