Yes, with only 21 million of them there is no level of success small enough to give a stable price under $1000. So the only possibility for BTC not to reach $1000 is if it goes to 0. Which isn't impossible of course.
You're thinking really long term.
The block reward will get cut in half in 4 years and by that time it'll be worth around $1000 for sure.
There'll be bitcoin atms, bitcoin smart cards, there'll be more places that accept bitcoins like Germany.
I think the proper question is if it will reach $1000 before that.