Here is some content that you can check out to really see how unique and complex can bugs get:

1. 164.000$ Google Bug Found: https://www.youtube.com/watch?v=g-JgA1hvJzA

2. 7.500$ XXE Bug: https://youtu.be/aSiIHKeN3ys

3. 37.500$ Shopify auth bypass: https://www.youtube.com/watch?v=ZFst3-r-9Lg

4. 20.000$ Hackerone data leakage: https://www.youtube.com/watch?v=tJtNTqviOGg

5. Javascript for Hackers: https://www.youtube.com/watch?v=FTeE3OrTNoA