No one knows will btc break 20k again in this run or not. We already stucked between 11-12k range and this getting dangerous for furhter growth
Bitcoin's price is volatile, so it is always unpredictable in the market.
I have my own pattern, but i'm not sure about this and i'm observing it. Maybe in 2021, it surpass an another ATH again because as you can see in 2016 halving and the ATH occurs in the end of 2017. Probably it can happen again at the end of 2021 which is not that impossible to happen.
We have different predictions, right now we are experiencing sudden increase in its price but that's not that good enough to say that btc will reach another ATH this year.