Simple solution:
Depending on the amount of money, you can lie to your family about how much money you won. preferably 1/4 of what you actually got.
Then fake your own death before they can suspect that you lied to them about the money
THEN let your family fight over what they inherit from you, all while you keep the majority of the money for yourself without them knowing it.
Alternatively, if you really wanna be a dick, you can let all of the "inheritance" go to charity after you fake your death. That way your family gets nothing.
