Moved here because it is a scam.
This is the classic "cancer victim" format. They are all variations on the same theme. It always features:
a) a rich dying person
b) who has not lived a good life but want to make a deathbed conversion to goodness
c) who has selected you out of 6 billion people on the planet to help
d) him/her donate all or most of his/her money to charity
e) for some strange reason cannot directly access his/her money but YOU can
f) of which 10-20% will go to you the rest should go to charity.
Best to delete and move on. There is nothing real in that one.
Silence is the scammer's best friend; knowledge is the scammer's worst enemy. 沈黙は詐欺師のよき友達、知識は詐欺師の天敵。Think globally, act globally.