If you're new to the world of crypto scams, it's really amazing how prevalent and blatant many of them are.
I've really enjoyed Coffeezilla's YouTube account [1] that does in-depth investigations of them, and Molly White's site [2] that tracks the scams + aggregate total losses (>$12B)
[1] On Tether: https://www.youtube.com/watch?v=W4OdvcCfQlY