I would madly expand my rubber duck collection. I would buy a bigger house so I could have a large room just for my duck collection. Instead of the 99 ducks I know have, I would have thousands.
And I would also buy art glass from the world's best living glass artists such as Lino Tagliapietra, Dale Chihuly and Big Bill Morris. I would need several rooms for this collection.
And I would get three more cats because I think that one has to have at least 6 cats to qualify as "Crazy Cat Lady". I would have a super cat enclosure built for my cats.
Dun forget Yoshitaka Amano, i get a few mil, and i'll have him do a stain-glass skylight