1. Thinking that getting rich is easy.
2. Not doing your own research.
3. Trusting random dudes from Youtube/Twitter/Telegram Group.
By the way, cryptocurrency isn't all about exchanges/trading.
Nice summary you got there buddy and I like it. They choose crypto because they want to be rich so easily. Always believe in your due diligence and dont get affected by hype from shillers coming from twitter and youtube. And I absolutely agree, cryptocurrency is very wide and its not all about trading. You can stake or run some masternodes to gain money from it.