Invest half
use 300,000 for a cute flat (paid in full)
then use 20,000 to buy a new closet and some cute home decor
use 88,000 for 4 years of university tuition
keep 8,000 in my chequing
use maybe 50,000 for living expenses
put 34,000 in saving
boom I'm set for life.(the fact that I think it'll be that simple)