How did you know and know that grandfather Satoshi Nakamoto, have you ever met him, I'm not sure...
There are dozens of photos and personal data that calls itself Satoshi, if you look at the photo he is in his 60s.
You said Satoshi, born 1975 so now he is 45 years old, are you sure that old man is still alive...
I mean the people in your post.
I'm not sure that grandfather is Satoshi, he is
Satoshi Ajinomoto. Not Satoshi Nakamoto...That is Satoshi Nakamoto's robot/imitation.