What are some common mistakes/regrets in crypto?

We are all humans and humans make mistakes. At times we are too greedy and buy stupid shit at ATH. Other times we are too fearful and miss out on good stuff.

So what are some common mistakes in crypto? Whether made by you or someone else, whether a beginner mistake or mountain-sized blunder, do share the story so we can all learn from it.

Personally my biggest mistake is buying an obscenely large amount of CRO after viewing the Matt Damon and also seeing it shilled a lot here. I feel like crying everytime I see my portfolio since it's very much down and pulls everything else down.

TLDR: share your noob crypto mistakes so we can laugh at you learn from each other