Stock prices fluctuate every day. One day we rise without any reason to be happy, and other days we plummet helplessly. Ants with their faces buried in their smartphones are having fun in real time. Words like ‘young kkeul’ and ‘debt investment’ are used interchangeably between real estate and stocks. In the meantime, I am greedy and don't know who the 'owner' of the stock is, and I don't know what to do and I am inaction. Even people whose business is related to stocks...