1. A reader left a comment under my article "Investment Experience with ORDI" on March 6th, expressing the regret of selling off a four-digit amount at 12 yuan when they believed that AICoin would also experience a pullback on Binance. They mentioned that they do not like short-term trading but made their most failed attempt at it.

2. What is NAT? In the article, I mentioned DMT-NAT based on digital physical theory. For more details, please refer to https://ordinalswallet.com/collection/tap-DMT-NAT. There are many articles online about this protocol, and you can search for DMT NAT. The concept is quite interesting, but there are not many projects based on it at the moment.

3. None of the coins I hold have increased in value. Is there still hope? This question probably can only be answered by oneself. We can think about it ourselves: Is the lack of increase in value due to problems with the coin itself or the market temporarily overlooking it? If the coin is not the issue and it's just being temporarily overlooked by the market, then it's not a big problem. Because in a bull market, almost every track will rotate, and as long as the coin is not problematic, it will rotate sooner or later. If you are not sure whether your coin has a problem or not, you can try to recall why you bought it in the first place. Now, check if the reasons for buying it initially still hold true. If you can't answer these questions, it means you still don't understand it. Since you don't understand it, you are frustrated and feel hopeless, then it's better to just exchange it all for Bitcoin and Ethereum.

4. For those who are new to the coin circle and have not experienced a complete bull and bear market, they have no concept of risk. In 2021, I mortgaged my house at the end of the bull market, and then suffered for three years, only seeing hope this year. When I saw this reader's comment, I couldn't help but feel anxious for them. I have always advocated using spare money for investment, never using money that affects one's livelihood, and never using mortgaged assets to raise capital. Operating with such high leverage carries a very high risk. I think this operation went smoothly due to good luck, but everyone's good luck is limited. Once luck is not so good, all previous efforts will be in vain. In addition, using such high leverage for operations, even if the final result is good, will cause significant psychological and physical damage. During this process, living in a state of fear and anxiety every day, it is very likely that before seeing the fruits of victory, one's psychological and physical health will be affected. Once there are health issues, no amount of money will help.

5. After reading Vitalik's article, he mentioned that in the face of a quantum attack, Ethereum can use a rollback method. What do you think of this approach? I understand that Vitalik is talking about extreme measures. However, if this situation really occurs, it would not be surprising for Vitalik to do so, as Ethereum did this after the DAO incident. I think such incidents should be avoided as much as possible because once they occur, whether to roll back or not will damage at least half of the community's consensus. In addition, I think the probability of such a situation occurring is very low, and there are already deployment and arrangements for resisting quantum attacks in Ethereum's future development path. The Ethereum community also has a team dedicated to researching resistance to quantum attacks. So overall, I am not too worried about Ethereum being attacked by quantum.

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