I think every year is repeated. And at the end of 2018 with new volumes will jump even higher than in 2017.
We will see a bullish trend near year end as you stated this is repeated almost every year.
But will the degree of jump and bullish phase will be as comparable to last year? This is a point to ponder. Due to future contracts, I feel the growth will be slower as compared to the last year. Also, people already have the idea of bullish phase and hence, most will try to sell near year end. So, there would be a slower growth.