Top Beginner Mistakes in Crypto- Work in Progress

Steemians-

I'm working on an information product right now that I hope to share with all of you for free when it becomes available.

The topic covers an issue I am starting to see as interest in crypto ramps up: the dangers to new investors and speculators who are often joining this space from a non technical background.

Here is my list so far of big mistakes.

Assuming top20 means anything about viability

Scammers using slack, phishing, etc

Losing private key

Copy pasting wrong address (malware)

Trading on margin

What would you add to it?