Let's see the historical data:
- First halving, on November 2012 : Bitcoin increased from $11 to $1,100 in 2013 (one year later)
- Second halving, on July 2016 : Bitcoin increased from $600 to $20,000 in 2017 (one year later)
- Third halving, on May 2020 : Bitcoin increased from $6,000-$8,000 to $??? in 2021 (one year later)

Based on historical data, the maximum rate of BTC in 2021 (not in 2020) should be more than $20,000 (ATH in the second halving).
However, there is no guarantee, mate.  

BTC price/rate prediction:



*Halving data got from: hackernoon.com
*Chart picture got from:cryptocointrade.com