There's at least a quarter and a month left this 2019. It could still get big enough to reach the $19,000 for a day or less if there's a bull run and there won't be any sudden drops during the bull run.
I think new ATH will come, there is big possibility if we see hardfork almost come. Maybe in 2019-2020 it can reach it's new ATH and if no serious or big problem happen, it can increased a lot in that time.
Hardforks won't contribute much to Bitcoin's price even if there's several of them it won't be enough to pump the price since they don't have a lot of value.