If I earn 60 million in the cryptocurrency industry, I will choose to retire: this profit system should be sealed off! My nine-year career in the cryptocurrency industry, from the 20000 principal I raised in 2016 to the assets I have today that allow me to lay flat, has never relied on luck. At that time, this profit method, which was rated as a "stupid system" by cryptocurrency enthusiasts, should also be sealed with my retirement. ​ The core of the system is "three lines determine the universe". Open the candlestick chart and always focus on three lines: the 50 day line sets the short-term trend, the 200 day line distinguishes between bull and bear, and the trading volume line determines the authenticity of funds. In 2017, when Bitcoin broke through $5000, the 50 day line had just crossed the 200 day line, and the trading volume suddenly increased to three times the six-month average. I spent all the 3 million yuan I mortgaged my wedding house, and that bull market made my account break through 10 million for the first time. ​ Iron laws are like fuses in a system, indispensable. ​ Iron Rule 1: Single currency holdings should not exceed 15%. When Litecoin skyrocketed in 2018, I only placed a 12% position according to the rules, and even though it later fell by 80%, it didn't hurt my bones. Diversifying positions is like putting a shock pad on wealth, no matter how crazy the market is, it cannot shake the principal. ​ Iron Rule 2: The stop loss line is the last line of defense. Mainstream coins must be cut when they break the 50 day line by 8%, while altcoins must be cut when they break the 5% line. On the eve of the LUNA crash in 2022, the system automatically triggered a stop loss, and my 1% position only lost 70000 U, while someone around me was in debt of millions as a result. ​ Iron Rule Three: Only make 3 transactions per month. In the early years, I always wanted to catch every fluctuation, but as a result, I frequently operated and lost half of my property. Later, by forcing myself to make a maximum of three moves per month, I managed to seize key moments such as the sharp decline on March 12th in 2020 and the pullback in April 2021. ​ The last transaction was last week. The Ethereum 50 day line touched the 200 day line for the third time but did not fall below it, causing the trading volume to shrink to a recent low. This is the "golden buying point" given by the system. I entered the market with an 8% position, and after three days, when it rose by 15%, I took profits according to the rules, which just allowed my account to cross the 50 million threshold. ​ When tidying up the office, I turned to the transaction log from 2016, and the title page read 'retire if you earn 50 million'. At that time, I ate Mantou in a rented house in a village in the city. I never thought I could wait until that day. The secret to profitability is actually written on the last page of the log: "Complex systems earn money from emotions, while simple systems earn money from time As for this system, it may be engraved in a USB flash drive and buried in the backyard - the money in the cryptocurrency circle cannot be earned completely, but there should be more scenery worth seeing in life than the K-line. After all, true financial freedom comes from finally having the confidence to say to those who are watching the market late at night, 'There's no need to see you again.'.