I think next year is possible but not probable. My central estimate is q1 2019. What you do in your trousers is of no interest to me.
I am no expert on dash, but consider it conceivable, if unlikely, that it may be 4000 in the same quarter; however, it is at least equally likely that a reflexive cascade of masternode liquidations, or instamine dishoarding, or a high-visibility compromise - take your pick; surely compromise would lead to a torrent of liquidation - will take dash down to double digits, even single, at that time.
I am no expert in either Dash or Monero, but if you look from my simplistic average user (yes, user, nor just hoarder and definitely not trader), then you can understand my long surprise with how they have both turned out so far in terms of price.
I have so many uses for Monero, but only know 1 place that I might use it.
Forget comparisons of tech, both are probably too sophisticated for users like me to utilize 100%. I cannot speculate what Dash or XMR will cost in 2018 or 2019.
But exactly, 4000 is posssible, I can imagine it for DASH. But I can more easily imagine worse things like you point out: MN liquidations, instamine offloading.