I’m extremely confused but I will have a better understanding soon!!!

As all people know, investors should always avoid emotional investing. But in most cases, investors' mood swings when the market is highly volatile.
People are not entirely rational. Feelings and other intangible stuff dictate them. Human beings are not able to act like machines and programs. It's nearly impossible for one to eliminate every shred of feelings. 
In that case, every investor must have been through "emotional damage" more or less in their trading journey...

Hi, mooers!
Welcome back to "What's new in moomoo"!
This time we have some new features and optimizations from PC v12.0 and Mac v12.0 ready for you, including futures seasonal analysis, option ranking & unusual option activity and ETF holdings. Now let's  check out the new features!

During my earlier years when startes experimenting with stocks, I did set a loss and profit cut off at around 10% of the base. But as i aged with experience and focusing on buying good companies (blue chips, S&P), i review the losses as paper loss/interim losses.
Companies with good financial grounds and established markets, we all know that in long term, it will gain and profit. This is like placing our money in banks, we will generate gains for us (dividends). Based on past...