Once when we hit $13,5k level and break it, $16k won't be a problem very soon.
The higher highs after the ATH is around $13,8 if I'm not mistaken so it's really a big mental barrier to break again.
If Stocks run last a few more months, its possible for bitcoin to hit 16k until Jan-Feb.
Others have pointed that we have some correlation on stocks, so it's possible, if both markets suddenly experience a pouring of money to fuel a bull run before the end of the year.
Altcoins must be dumped in that time. We need that fuel to go in BTC directly.
I think it's a continue pump and dump, and after a altcoin dump, investors are going back to BTC.