This is most likely a photoshop.
The actual tweet can be found here.
The post can be found here, posted 18 May 2021, 3 weeks before the tweet.
From comments on the post, it appears that 3ChordPolitics created this using either an image editor or a billboard generator.
antifa_superfrog Someone posted this on Twitter and everyone thinks it’s an earnest defense of billionaires hehe. 1d
3chordpolitics @antifa_superfrog That's hilarious. 1d
Considering the facts that:
- The Twitter poster lied about finding it in the wild.
- The picture comes from an Instagram account that regularly posts photoshopped photos.
- The original poster implicitly acknowledged that it was a fake by his comments saying that he found it hilarious that people thought it was real
- There is absolutely zero coverage of this billboard as far as I can tell.
It's probably safe to assume that this is fake.