Ok let's spend 10 millions for some family members.
40 millions for charity: cat shelters, tigers in Siberia, children in Africa
10 millions we leave open. Maybe I feel that some 1000 year old Byzantine churches in Southern Greece need a roof so that their frescoes aren't washed away.
Lets assume I keep 40 millions for my private luxury: my life would be travelling and writing. But to feel really well I would need some houses around the world. I would start with a beach house ( a smaller one) in Northern California or Southern Oregon. I'd need something in Italy -how about a flat in a Venetian palace- or Southern France. For beach? A Thai island? A traditional house with a courtyard in Marrakesch? Another beach house in New Zealand?

I'll have to solve the cat problem: Cats do not like to travel that much.

Maybe it's good that my chances are so low. (*smiles while thinking of Filou and Tigris*)