1. Do not remember electronic wallet password
2. Do not back up your wallet
3. Do not research new services
4. Buy and sell based on feelings
5. Leave your money in the electronic money floor
6. Waste time on faucets (we all did)
7. Collect dust and pay high fees on it
8. Leave coins in an exchange
9. Trust the wrong people and get scammed
10. Panic at a price correction
This is all absolutely true. And one more thing, investing in different sites without knowing or checking any background if its legit or not. Doing a panic selling is also one of the biggest mistake for some of bitcoin user. Patience is a key element of success. Always remember the best things in life comes to those who wait patiently.