Reasons for losing money in a bull market??

Not calming down, a restless mindset can lead to frequent portfolio changes. I know a friend whose plan was to turn 200,000 into 80 million. When I got to know him, he had already played a round in 2017. In 2019, after buying coins, he deleted the app. In 2021, when he opened the app again, it had already increased by more than ten times. He sold immediately and exchanged it for USDT. He deleted the app again, and in March 2023, he downloaded the app, bought coins with USDT, and deleted the app again. He plans to sell the coins in 2025 when he opens the app again. What I know is that he has multiplied his principal by almost 200 times using this method. Earning money in a big trend is not difficult, but if you act frequently, it becomes very hard. I also have a friend who bought three coins in 2021, then deleted the app, and when he re-downloaded it in 2024, he found that most exchanges had exited, rendering them almost worthless. #我的COS交易