$BTC always only operates with 10%-20% of disposable funds, for example, if you deposit 100,000, the maximum you can invest is 20,000. I've seen too many people bet their entire fortune or even borrow money, only to collapse mentally in the end. The real winners are always in a 'can afford to lose' state. For example, with Bitcoin dollar-cost averaging: invest 10% of your monthly salary in batches, and even if there's a 50% drop in a bear market, it won't affect your quality of life.

【Stop-loss is more important than profit | 5% mandatory stop-loss line】

When the direction is wrong, a loss of 5% must be immediately stopped. I once held onto positions during the LUNA crash, watching helplessly as 100,000 turned into 1,000. Now my discipline is: exit when breaking the 5-day moving average for short positions, and liquidate when breaking the 20-day moving average for medium positions. Remember: as long as you are alive, there is a chance to turn things around.