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Loss-raising and left-side position building look very similar, but two things. The cycles are different. The cycle is short when you take a position at a loss in order to win a rebound. To open a position on the left side, the cycle is long. The cycle is different, the goal is different.

Keep losing money, keep adding positions, hoping to earn back all the money you lost through one or two waves of rebound, if you do not earn back okay, earn back you will fall into a "think you are doing the right thing" dilemma. It will give you positive incentives, waiting for you will be a bigger trap.

Warren Buffett's teacher Graham wrote several important books on securities analysis, including "The Intelligent Investor", before he went bankrupt because he lost money and increased his positions.

Jesse Livermore, the first short-seller on Wall Street, shorted the U.S. stock market in 1929, and was a master of technical analysis in the trading field, but he still "died" by adding to his positions at a loss.

Whether for retail investors, institutional investors or very famous investors, one of the biggest losses or bankruptcy in life, all from the only operation to add positions at a loss.

Economist Keynes also said: the market will continue to be irrational for longer than you can afford. The market will always remain irrational for longer than it can make you go bankrupt.

Keynes' quote also comes from his own operating experience. Because he also used the method of desperately adding positions at a loss, resulting in his own bankruptcy once.

So why, you may ask, did Keynes and Graham, very famous figures in the field of securities analysis and finance, end up making a good living? You have to go back to the eighth principle: focus on your own work. Although they have speculation operation went wrong, bankrupt, but the professional ability is very strong, work can still help them continue to make money, continue to win greater fame in society.

So 8 and 9 these two principles should be put together. The pain of others should become your experience, and do not try it yourself, do dangerous things to make yourself suffer to remember

Optimism has merged the OVM 2.0 changes into its main branch on November 11, and other major improvements to OVM 2.0 include: contracts whose source code has not been validated by Etherscan will be purged along with their storage, contracts whose source code has been validated will be recompiled with the standard Solidity compiler, EOA will no longer be a contract wallet, and more.