$BTC

After the halving on May 11, 2020, Bitcoin started to show a significant increase in its price a few months later. Let's break it down:

- **May 11, 2020 (halving):** The price of Bitcoin was around $8,500.

- **July 2020:** The price started to rise significantly, surpassing $10,000.

- **December 2020:** The price of Bitcoin reached around $20,000, reaching its previous all-time high from 2017.

- **2021:** Bitcoin continued to rise, reaching new highs throughout the year, culminating in its all-time high in November 2021.

Therefore, after the halving in May 2020, Bitcoin started to rise notably about two months later, in July 2020.