Maybe the three mistakes you describe can still be forgiven and can be a lesson for further improvement. However, my mistake that I do not forgive is following friends in futures trading. I have often heard of friends going bankrupt because of crypto futures trading. They did not learn from their mistakes, and I followed them. Even though crypto is already volatile, then it was used as a derivative, it became very aggressive. Until finally I realized that crypto is more suitable for investment only. Don't be the next victim.

So the most fatal mistake in my opinion is following other people without having your own strategy and without your own research. In the past, I often saw friends FOMO into futures, in the end they lost. Even though trading on the spot is confusing, let alone using leverage. Now I prefer coins with good fundamentals and just HODL, it's safer.