You can reach millions if you propose to it, if you work hard, if you don't flinch, if you don't lose motivation, if you promote good enough, if you have a steady schedule, if you're willing to polish your abilities.
Nothing comes easily, in Facebook you can connect with millions and still you can have less than 100 friends on your account. You can watch anything in Youtube, but it's you the one rewatching the same videos or songs all over again.
The door is open, but it's up to you where you decide to go.