$MSTR $MSTR3S
7% drop after my post in 3s that is around 20% profit running

#我的七夕交易分享 Why Position Management Is Extremely Important (Underlying Logic)
No one can guarantee that every judgment will be correct; there are no 100% accurate signals in the market.
Even with a 60% win rate, staying fully invested and suffering several consecutive sharp drops caused by negative news can lead to a significant account drawdown, making recovery extremely difficult.
Basic math: A 20% drawdown requires a 25% gain to break even; a 50% drawdown requires a 100% gain to break even.
Avoid black swan risks. A single stock or coin can implode, an entire sector can crash, unexpected policies can emerge, or the broader market can face systemic risk. Concentrating too much in one position can severely damage your account after a single piece of negative news.
Retain the initiative to act. After going fully invested, you have only two choices: hold the losing position or cut your losses. Keeping cash allows you to add to positions at lower levels, switch to better assets, and move flexibly between offense and defense.
Overcome human weaknesses. People impulsively go fully invested after sharp rises and panic-sell during declines; position-sizing rules can strictly constrain emotions and prevent greed and fear from taking control.
The truth: In the short term, luck can make you rich through going fully invested; stable long-term profits can only be achieved through standardized position management.