Frankly I think every stock-oriented subreddit is a controlled operation meant to pull value from the subscribers only. I doubt almost any thread on those subs are people authentically sharing their perspectives.

Yes. The data for the image isn’t hosted in the block chain of the NFT. The NFT is basically an unfalsifiable digital signature of authenticity.

They’re popularly used for digital art, but can be paired with any technology as a digital signature.