Speaking of the game of dual currency investment Yesterday, the market suddenly experienced a sharp drop, bringing two pieces of news: good and bad. Good news: ETH has been retrieved Bad news: The settlement price is $2930, but the average price I set is $3075 The final result: Compared to the "sell fly" event half a month ago, the number of ETH coin holdings has decreased by -3.5%. If calculated at an annualized rate of return of 60%, it would take about 3 weeks to work for nothing. Given this, it is worth delving into the underlying logic and mindset of "dual currency investment". one ️⃣ Dual currency investment is equivalent to selling insurance When nothing happens, you can steadily earn premiums (power and profit); Once a 'black swan' occurs, you will have to pay huge compensation (sell at high levels, buy at high levels). Essentially, this black swan event is fundamentally unpredictable and should be seen as part of the 'business model' rather than just 'unlucky' or 'selling off'. Insurance companies rely on the law of large numbers to ensure their invincibility, while "dual currency investment" requires long-term participation to maintain "positive profits". two ️⃣ Applicable market conditions Grid trading, LP market making, and dual currency investment all have one thing in common: they are particularly suitable for volatile market conditions and not suitable for unilateral market breakthroughs (whether rising or falling). If you can predict the future market trend, especially the trend market, then it is best to decisively stop these three types of operations. Of course, the current market situation is really torturous, either thinking it's a bear early or thinking it's a bull. The result is just repeated deception and unbearable suffering. But judging the future market trend is indeed difficult. three ️⃣ mentality Since the "high selling" at the beginning of the month caused me to sell out my ETH position, I have been worried about a "bull run", which means I will never be able to buy back the same amount of ETH again, and even feel that "it is impossible for it to fall below 3000 again". So in the subsequent operation of reverse "buy low", the prices of pending orders are generally high. For example, the average price of orders placed yesterday was $3075. In the end, it was found to be wishful thinking and too radical. Later, I realized that I needed to maintain a calm state every day at 4:30 pm when operating the "dual currency investment", even if it was only for about 10 minutes before and after. Not greedy, not afraid. This actually has many similarities with trading, except that "dual currency investment" as an option seller has more margin for error. At the end of the transaction, you will find that the ultimate competition is not about skills, but about the control of mentality. Obviously, these results indicate that I still need to continue refining myself. The above.