Human lost of memory

[o_e_l_e_o]

If no one else has access to the transaction, then how will they inherit it? Do you assume the lawyer knows that hidden place? If that's so, can't they blackmail their client(s) if you pass away? I only know the second way as the standard one.

If my family inherit my house, then they will inherit the safe inside my house as well. I can tell them the code to the safe, or I can leave the code to the safe in my will. Even if the lawyer tries to blackmail them by refusing to tell them the safe code, safes are not impenetrable. Even without knowing the code, they will gain access to the contents sooner or later.

Memory disorders may occur in the elder ages, such as brain injury, amnesia, Alzheimer's disease, agnosia.

Many of these things can occur at any age. Memory is not a reliable recovery or back up method, regardless of your age or apparent good health.

[Upgrade00]

what is the possibility that memory loss will be so selective? Only to the part where the private key info's are stored.

The op was not particular about selective memory loss, it's more of a generalized situation where one losses their memory and no longer have any recollection of their bitcoins, in such a situation how can the bitcoins be recovered by the family of the person?
There have already been quite some good suggestions that should work, the important things to now when leaving someone or a group of people an asset, especially one like Bitcoin which is not regulated;
• They have to be technically able to use it,
• It has to only be accessible to them (the group you're leaving it with),
• They ideally should not be able to access it while you're alive, except you trust them highly,
• You'll need to consider the longevity of the source you're keeping it on.

[Rengga Jati]

Humans are very sensitive in brain and if anything happen to humans skull it will affects the brain cells, so I want to ask for those of us that have Bitcoin in their designated wallet's, what's the remedy if we have Bitcoin and we happened to lost our sense organ, what are possible way can our relatives retrieve or recover our Bitcoin.

It is really possible to happen, including the death also.
If we have someone who really trust moreover the family, we can share where we leave or save the data. So  that he or she is possible to do something with our assets if something really happens to us and we cannot handle them anymore.
It is probably risky because we really must find the right person, most trust, and also besides us forever.
It can be our husband, wife, or even our trust child.
I will prefer to make certain note hidden secretly if that is for our children.
For me myself, I trust my couple in life and I always share whatever including the data about my crypto assets and we are also working together to manage the assets.

Can someone inherits another person Bitcoin, because I know that Bitcoin is a digital currency and one person have access to penetrate to it's wallet.

Yes it is possible as long as they know the information or data to access your wallets, such as Private keys, phrase, Pin, passwords, or other data that is needed to access your wallet.