The correct investment philosophy and trading strategy with positive expectations are the magic weapons that can make you make big profits with small losses. I am still saddened to learn that my group members lost 2 million yuan last year due to contract backlog. Last year, I thought we had been playing meme all along, and overall everyone should be making money. However, it turned out that many people lost money on replenishing positions, many people lost money on second tier contracts, and many people lost money on contracts. This is also why I have been repeatedly proposing take profit and stop loss strategies in the group since this year, and repeatedly proposing trading strategies that build positive expectations. Recently, I have been doing classic trading book co reading camps with this consideration. Because too many people in the cryptocurrency industry have a gambling mentality, they may not have read a classic book and rush into the cryptocurrency industry with their savings. I didn't do well either, I didn't do this set earlier. I hope that what we are doing next will benefit our group members.