It also depends when PS5 will be released. If PS5 will be released in 2019-2020, PS4 could pass 130M.
But I don't think PS5 will be out so late. So I stay with my 120M.
”Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world.”
Harriet Tubman.