In the world of crypto everything is possible. We have not even reached a $1 trillion marketcap (BTC + altcoins), I think that it will be a major milestone, and if that happens, then possibly BTC will touch the $100K mark. Of course, everything is just a possibility right now.
Furthermore, remember that BTC has gained more market dominance during this market (42.8% right now), and it proves once again that it is still King!