Perhaps it is just a test.
Again and again, year after year, Voldemort goes and checks how his boy Harry grows every year. Is his power becoming stronger and stronger? Can he compete with the Dark Lord, or can he even beat Voldemort?
It's just like seeing his own bride.
To see his growth each year, to watch his gradual change until attaining maturity each year...
It's the time.
Yes, he is waiting, waiting for his boy to fully grow. Fruit is the sweetest at that time.
So, he is waiting, waiting for a being who who would eitherfight against him or stand besides him.
Having been waiting for sixty lonely long decades, the mighty warlord ha