I agree. If you're a dedicated user, you can get past 250,000, but then there's no more motivation. Yes, there's an extremely rare black hole badge at 10 million, but one, its description is "???", and two, it's ridiculously far away.

I see how more avatars could be helpful and motivational but one thing I suggest is that there are many characters that are obtainable from energy check points all I am saying is that there should be more avatars obtained by completing course for example one we already have is Winston and error buddy I also support your positive look on avatars and I agree with it. 

- Thadd Austin.

Hi everyone,

Thank you for sharing your suggestions! While we’re continuously adding new content to enhance education on Khan Academy, expanding our list of avatars and bringing backgrounds isn't currently on our roadmap. 

We appreciate your enthusiasm and feedback, but we have to prioritize requests that align with our goals. It's possible we might revisit this in the future, but I can’t guarantee it or provide a timeline. 

Thanks again for your understanding!

Quoted by xyzyyxx:

I agree. If you're a dedicated user, you can get past 250,000, but then there's no more motivation. Yes, there's an extremely rare black hole badge at 10 million, but one, its description is "???", and two, it's ridiculously far away.

That badge is Tesla.