2020 is really long time period for price prediction. But minimum is 12000$ and i cannot find a highest level.
If we are talking when i will sell my bitcoins then i will sell if bitcoin price hit 100k$ then i will get retired for sure.
While we might overshoot to $10000+ in the coming months, there is still the possibility of a bear market in 2018/2019 that will take us back to the $2000 - $6000 range for quite some time, so to say that $12000 is a minimum price in 2020 is pretty optimistic.