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
Let's admit that we all did this when we're still a beginner and for sure even now.
A lot of mistakes that taught us to learn new things and not to do that again.
I just smile when I read these like being nostalgic. Haha!
I must say experience is always the best teacher to all of us like if we didn't experienced these we're not here in where we are. And making mistakes at once or twice is fine but when it's done repeatedly it's already foolishness.