Of course, it's like a normal say here that only trade with the amount of money that you can afford to lose, but how many of us sticks to that rule. My worst mistake in trading was to depend on technical analysis when opening a position because this year was different due to the news from Trump trade war with China. I ran at loss and decided not to believe on technical analysis anymore since fundamental analysis plays a major role on bitcoin price movement.
This has also been the mistakes of many other fellows here, they totally depends on technical analysis, even though they knew its not supposed to depend on it totally.
Yet, they still do it, which they will refused or ignore to follow the rules and regulation in order not to be tempted to do what will later destroy their investment and might make them to even give up in anything that concerns crypto but its essential to also remember that anything crypto, whether its investing or trading needs patience in order to get through it.