I would slightly elevate my standard of living, but primarily with things that actually bring me joy and/or serve a purpose. I'd get a better mattress, a reliable car that isn't necessarily a sports car (I like being able to have passengers and groceries), maybe a roomba. Then I'd work to make the rest of it help as many people as possible in the best way possible. I would never forgive myself if I ended up with such a surplus of resources and was still miserable when others who need those resources more would actually benefit from them.